[libphobos] Committed merge with upstream druntime 5bb8ce19

Message ID CABOHX+e7rxDbFodyyspXzXMdKw7RZhqx6_cWv4itF72=8dzokg@mail.gmail.com
State New
Headers show
Series
  • [libphobos] Committed merge with upstream druntime 5bb8ce19
Related show

Commit Message

Iain Buclaw Aug. 21, 2019, 8:02 a.m.
Hi,

This patch merges the libdruntime library with upstream druntime 5bb8ce19.

Synchronizes extern(C) bindings with the latest release, mostly this
is just Musl target support.

Bootstrapped and regression tested on x86_64-linux-gnu and x86_64-linux-musl.

Committed to trunk as r274773.

-- 
Iain
---
libphobos/ChangeLog:

        * libdruntime/Makefile.am (DRUNTIME_DSOURCES_BIONIC): Add
        core/sys/bionic/string.d.
        (DRUNTIME_DSOURCES_DARWIN): Add core/sys/darwin/string.d.
        (DRUNTIME_DSOURCES_DRAGONFLYBSD): Add core/sys/dragonflybsd/string.d,
        core/sys/dragonflybsd/sys/socket.d.
        (DRUNTIME_DSOURCES_FREEBSD): Add core/sys/freebsd/string.d.
        (DRUNTIME_DSOURCES_LINUX): Add core/sys/linux/string.d.
        (DRUNTIME_DSOURCES_NETBSD): Add core/sys/netbsd/string.d,
        core/sys/netbsd/sys/featuretest.d.
        * libdruntime/Makefile.in: Regenerate.
---

Comments

Matthias Klose Aug. 22, 2019, 9:24 a.m. | #1
On 21.08.19 10:02, Iain Buclaw wrote:
> Hi,

> 

> This patch merges the libdruntime library with upstream druntime 5bb8ce19.

> 

> Synchronizes extern(C) bindings with the latest release, mostly this

> is just Musl target support.

> 

> Bootstrapped and regression tested on x86_64-linux-gnu and x86_64-linux-musl.

> 

> Committed to trunk as r274773.


Does the change the ABI?  Asking, because apparently the out-of-tree libgphobos
for GCC 8, and the one in GCC 9 don't seem to be ABI compatible.

Matthias

Patch

diff --git a/libphobos/libdruntime/MERGE b/libphobos/libdruntime/MERGE
index 507aad1f4de..b8da026ba02 100644
--- a/libphobos/libdruntime/MERGE
+++ b/libphobos/libdruntime/MERGE
@@ -1,4 +1,4 @@ 
-94686651757294d608cfd5f053fda09dcf86695e
+5bb8ce19fa495e5f794b3c513ae1bf7aabae93ff
 
 The first line of this file holds the git revision number of the last
 merge done from the dlang/druntime repository.
diff --git a/libphobos/libdruntime/Makefile.am b/libphobos/libdruntime/Makefile.am
index a2b4541c0e6..d3fc347e2d0 100644
--- a/libphobos/libdruntime/Makefile.am
+++ b/libphobos/libdruntime/Makefile.am
@@ -198,7 +198,7 @@  DRUNTIME_DSOURCES_GC = gc/bits.d gc/config.d gc/gcinterface.d \
 DRUNTIME_DSOURCES_GCSTUB = gcstub/gc.d
 
 DRUNTIME_DSOURCES_BIONIC = core/sys/bionic/fcntl.d \
-	core/sys/bionic/unistd.d
+	core/sys/bionic/string.d core/sys/bionic/unistd.d
 
 DRUNTIME_DSOURCES_DARWIN = core/sys/darwin/crt_externs.d \
 	core/sys/darwin/dlfcn.d core/sys/darwin/execinfo.d \
@@ -206,35 +206,39 @@  DRUNTIME_DSOURCES_DARWIN = core/sys/darwin/crt_externs.d \
 	core/sys/darwin/mach/kern_return.d core/sys/darwin/mach/loader.d \
 	core/sys/darwin/mach/port.d core/sys/darwin/mach/semaphore.d \
 	core/sys/darwin/mach/thread_act.d core/sys/darwin/netinet/in_.d \
-	core/sys/darwin/pthread.d core/sys/darwin/sys/cdefs.d \
-	core/sys/darwin/sys/event.d core/sys/darwin/sys/mman.d
+	core/sys/darwin/pthread.d core/sys/darwin/string.d \
+	core/sys/darwin/sys/cdefs.d core/sys/darwin/sys/event.d \
+	core/sys/darwin/sys/mman.d
 
 DRUNTIME_DSOURCES_DRAGONFLYBSD = core/sys/dragonflybsd/dlfcn.d \
 	core/sys/dragonflybsd/execinfo.d core/sys/dragonflybsd/netinet/in_.d \
-	core/sys/dragonflybsd/pthread_np.d core/sys/dragonflybsd/sys/_bitset.d \
+	core/sys/dragonflybsd/pthread_np.d core/sys/dragonflybsd/string.d \
+	core/sys/dragonflybsd/sys/_bitset.d \
 	core/sys/dragonflybsd/sys/_cpuset.d core/sys/dragonflybsd/sys/cdefs.d \
 	core/sys/dragonflybsd/sys/elf.d core/sys/dragonflybsd/sys/elf32.d \
 	core/sys/dragonflybsd/sys/elf64.d \
 	core/sys/dragonflybsd/sys/elf_common.d \
 	core/sys/dragonflybsd/sys/event.d core/sys/dragonflybsd/sys/link_elf.d \
-	core/sys/dragonflybsd/sys/mman.d core/sys/dragonflybsd/time.d
+	core/sys/dragonflybsd/sys/mman.d core/sys/dragonflybsd/sys/socket.d \
+	core/sys/dragonflybsd/time.d
 
 DRUNTIME_DSOURCES_FREEBSD = core/sys/freebsd/dlfcn.d \
 	core/sys/freebsd/execinfo.d core/sys/freebsd/netinet/in_.d \
-	core/sys/freebsd/pthread_np.d core/sys/freebsd/sys/_bitset.d \
-	core/sys/freebsd/sys/_cpuset.d core/sys/freebsd/sys/cdefs.d \
-	core/sys/freebsd/sys/elf.d core/sys/freebsd/sys/elf32.d \
-	core/sys/freebsd/sys/elf64.d core/sys/freebsd/sys/elf_common.d \
-	core/sys/freebsd/sys/event.d core/sys/freebsd/sys/link_elf.d \
-	core/sys/freebsd/sys/mman.d core/sys/freebsd/sys/mount.d \
-	core/sys/freebsd/time.d core/sys/freebsd/unistd.d
+	core/sys/freebsd/pthread_np.d core/sys/freebsd/string.d \
+	core/sys/freebsd/sys/_bitset.d core/sys/freebsd/sys/_cpuset.d \
+	core/sys/freebsd/sys/cdefs.d core/sys/freebsd/sys/elf.d \
+	core/sys/freebsd/sys/elf32.d core/sys/freebsd/sys/elf64.d \
+	core/sys/freebsd/sys/elf_common.d core/sys/freebsd/sys/event.d \
+	core/sys/freebsd/sys/link_elf.d core/sys/freebsd/sys/mman.d \
+	core/sys/freebsd/sys/mount.d core/sys/freebsd/time.d \
+	core/sys/freebsd/unistd.d
 
 DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
 	core/sys/linux/dlfcn.d core/sys/linux/elf.d core/sys/linux/epoll.d \
 	core/sys/linux/errno.d core/sys/linux/execinfo.d \
 	core/sys/linux/fcntl.d core/sys/linux/ifaddrs.d core/sys/linux/link.d \
 	core/sys/linux/netinet/in_.d core/sys/linux/netinet/tcp.d \
-	core/sys/linux/sched.d core/sys/linux/stdio.d \
+	core/sys/linux/sched.d core/sys/linux/stdio.d core/sys/linux/string.d \
 	core/sys/linux/sys/auxv.d core/sys/linux/sys/eventfd.d \
 	core/sys/linux/sys/file.d core/sys/linux/sys/inotify.d \
 	core/sys/linux/sys/mman.d core/sys/linux/sys/netinet/tcp.d \
@@ -245,17 +249,19 @@  DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
 	core/sys/linux/timerfd.d core/sys/linux/tipc.d core/sys/linux/unistd.d
 
 DRUNTIME_DSOURCES_NETBSD = core/sys/netbsd/dlfcn.d \
-	core/sys/netbsd/execinfo.d core/sys/netbsd/sys/elf.d \
-	core/sys/netbsd/sys/elf32.d core/sys/netbsd/sys/elf64.d \
-	core/sys/netbsd/sys/elf_common.d core/sys/netbsd/sys/event.d \
+	core/sys/netbsd/execinfo.d core/sys/netbsd/string.d \
+	core/sys/netbsd/sys/elf.d core/sys/netbsd/sys/elf32.d \
+	core/sys/netbsd/sys/elf64.d core/sys/netbsd/sys/elf_common.d \
+	core/sys/netbsd/sys/event.d core/sys/netbsd/sys/featuretest.d \
 	core/sys/netbsd/sys/link_elf.d core/sys/netbsd/sys/mman.d \
 	core/sys/netbsd/time.d
 
 DRUNTIME_DSOURCES_OPENBSD = core/sys/openbsd/dlfcn.d \
-	core/sys/openbsd/sys/cdefs.d core/sys/openbsd/sys/elf.d \
-	core/sys/openbsd/sys/elf32.d core/sys/openbsd/sys/elf64.d \
-	core/sys/openbsd/sys/elf_common.d core/sys/openbsd/sys/link_elf.d \
-	core/sys/openbsd/sys/mman.d core/sys/openbsd/time.d
+	core/sys/openbsd/string.d core/sys/openbsd/sys/cdefs.d \
+	core/sys/openbsd/sys/elf.d core/sys/openbsd/sys/elf32.d \
+	core/sys/openbsd/sys/elf64.d core/sys/openbsd/sys/elf_common.d \
+	core/sys/openbsd/sys/link_elf.d core/sys/openbsd/sys/mman.d \
+	core/sys/openbsd/time.d
 
 DRUNTIME_DSOURCES_POSIX = core/sys/posix/aio.d \
 	core/sys/posix/arpa/inet.d core/sys/posix/config.d \
diff --git a/libphobos/libdruntime/Makefile.in b/libphobos/libdruntime/Makefile.in
index 1b20f0a756a..aaf05b534d8 100644
--- a/libphobos/libdruntime/Makefile.in
+++ b/libphobos/libdruntime/Makefile.in
@@ -278,13 +278,14 @@  am__objects_9 = core/sys/darwin/crt_externs.lo \
 	core/sys/darwin/mach/semaphore.lo \
 	core/sys/darwin/mach/thread_act.lo \
 	core/sys/darwin/netinet/in_.lo core/sys/darwin/pthread.lo \
-	core/sys/darwin/sys/cdefs.lo core/sys/darwin/sys/event.lo \
-	core/sys/darwin/sys/mman.lo
+	core/sys/darwin/string.lo core/sys/darwin/sys/cdefs.lo \
+	core/sys/darwin/sys/event.lo core/sys/darwin/sys/mman.lo
 @DRUNTIME_OS_DARWIN_TRUE@am__objects_10 = $(am__objects_9)
 am__objects_11 = core/sys/dragonflybsd/dlfcn.lo \
 	core/sys/dragonflybsd/execinfo.lo \
 	core/sys/dragonflybsd/netinet/in_.lo \
 	core/sys/dragonflybsd/pthread_np.lo \
+	core/sys/dragonflybsd/string.lo \
 	core/sys/dragonflybsd/sys/_bitset.lo \
 	core/sys/dragonflybsd/sys/_cpuset.lo \
 	core/sys/dragonflybsd/sys/cdefs.lo \
@@ -295,13 +296,16 @@  am__objects_11 = core/sys/dragonflybsd/dlfcn.lo \
 	core/sys/dragonflybsd/sys/event.lo \
 	core/sys/dragonflybsd/sys/link_elf.lo \
 	core/sys/dragonflybsd/sys/mman.lo \
+	core/sys/dragonflybsd/sys/socket.lo \
 	core/sys/dragonflybsd/time.lo
 @DRUNTIME_OS_DRAGONFLYBSD_TRUE@am__objects_12 = $(am__objects_11)
-am__objects_13 = core/sys/bionic/fcntl.lo core/sys/bionic/unistd.lo
+am__objects_13 = core/sys/bionic/fcntl.lo core/sys/bionic/string.lo \
+	core/sys/bionic/unistd.lo
 @DRUNTIME_OS_ANDROID_TRUE@am__objects_14 = $(am__objects_13)
 am__objects_15 = core/sys/freebsd/dlfcn.lo \
 	core/sys/freebsd/execinfo.lo core/sys/freebsd/netinet/in_.lo \
-	core/sys/freebsd/pthread_np.lo core/sys/freebsd/sys/_bitset.lo \
+	core/sys/freebsd/pthread_np.lo core/sys/freebsd/string.lo \
+	core/sys/freebsd/sys/_bitset.lo \
 	core/sys/freebsd/sys/_cpuset.lo core/sys/freebsd/sys/cdefs.lo \
 	core/sys/freebsd/sys/elf.lo core/sys/freebsd/sys/elf32.lo \
 	core/sys/freebsd/sys/elf64.lo \
@@ -311,12 +315,14 @@  am__objects_15 = core/sys/freebsd/dlfcn.lo \
 	core/sys/freebsd/time.lo core/sys/freebsd/unistd.lo
 @DRUNTIME_OS_FREEBSD_TRUE@am__objects_16 = $(am__objects_15)
 am__objects_17 = core/sys/netbsd/dlfcn.lo core/sys/netbsd/execinfo.lo \
-	core/sys/netbsd/sys/elf.lo core/sys/netbsd/sys/elf32.lo \
-	core/sys/netbsd/sys/elf64.lo core/sys/netbsd/sys/elf_common.lo \
-	core/sys/netbsd/sys/event.lo core/sys/netbsd/sys/link_elf.lo \
-	core/sys/netbsd/sys/mman.lo core/sys/netbsd/time.lo
+	core/sys/netbsd/string.lo core/sys/netbsd/sys/elf.lo \
+	core/sys/netbsd/sys/elf32.lo core/sys/netbsd/sys/elf64.lo \
+	core/sys/netbsd/sys/elf_common.lo core/sys/netbsd/sys/event.lo \
+	core/sys/netbsd/sys/featuretest.lo \
+	core/sys/netbsd/sys/link_elf.lo core/sys/netbsd/sys/mman.lo \
+	core/sys/netbsd/time.lo
 @DRUNTIME_OS_NETBSD_TRUE@am__objects_18 = $(am__objects_17)
-am__objects_19 = core/sys/openbsd/dlfcn.lo \
+am__objects_19 = core/sys/openbsd/dlfcn.lo core/sys/openbsd/string.lo \
 	core/sys/openbsd/sys/cdefs.lo core/sys/openbsd/sys/elf.lo \
 	core/sys/openbsd/sys/elf32.lo core/sys/openbsd/sys/elf64.lo \
 	core/sys/openbsd/sys/elf_common.lo \
@@ -329,15 +335,16 @@  am__objects_21 = core/sys/linux/config.lo core/sys/linux/dlfcn.lo \
 	core/sys/linux/fcntl.lo core/sys/linux/ifaddrs.lo \
 	core/sys/linux/link.lo core/sys/linux/netinet/in_.lo \
 	core/sys/linux/netinet/tcp.lo core/sys/linux/sched.lo \
-	core/sys/linux/stdio.lo core/sys/linux/sys/auxv.lo \
-	core/sys/linux/sys/eventfd.lo core/sys/linux/sys/file.lo \
-	core/sys/linux/sys/inotify.lo core/sys/linux/sys/mman.lo \
-	core/sys/linux/sys/netinet/tcp.lo core/sys/linux/sys/prctl.lo \
-	core/sys/linux/sys/signalfd.lo core/sys/linux/sys/socket.lo \
-	core/sys/linux/sys/sysinfo.lo core/sys/linux/sys/time.lo \
-	core/sys/linux/sys/xattr.lo core/sys/linux/termios.lo \
-	core/sys/linux/time.lo core/sys/linux/timerfd.lo \
-	core/sys/linux/tipc.lo core/sys/linux/unistd.lo
+	core/sys/linux/stdio.lo core/sys/linux/string.lo \
+	core/sys/linux/sys/auxv.lo core/sys/linux/sys/eventfd.lo \
+	core/sys/linux/sys/file.lo core/sys/linux/sys/inotify.lo \
+	core/sys/linux/sys/mman.lo core/sys/linux/sys/netinet/tcp.lo \
+	core/sys/linux/sys/prctl.lo core/sys/linux/sys/signalfd.lo \
+	core/sys/linux/sys/socket.lo core/sys/linux/sys/sysinfo.lo \
+	core/sys/linux/sys/time.lo core/sys/linux/sys/xattr.lo \
+	core/sys/linux/termios.lo core/sys/linux/time.lo \
+	core/sys/linux/timerfd.lo core/sys/linux/tipc.lo \
+	core/sys/linux/unistd.lo
 @DRUNTIME_OS_LINUX_TRUE@am__objects_22 = $(am__objects_21)
 am__objects_23 = core/sys/windows/accctrl.lo \
 	core/sys/windows/aclapi.lo core/sys/windows/aclui.lo \
@@ -798,7 +805,7 @@  DRUNTIME_DSOURCES_GC = gc/bits.d gc/config.d gc/gcinterface.d \
 
 DRUNTIME_DSOURCES_GCSTUB = gcstub/gc.d
 DRUNTIME_DSOURCES_BIONIC = core/sys/bionic/fcntl.d \
-	core/sys/bionic/unistd.d
+	core/sys/bionic/string.d core/sys/bionic/unistd.d
 
 DRUNTIME_DSOURCES_DARWIN = core/sys/darwin/crt_externs.d \
 	core/sys/darwin/dlfcn.d core/sys/darwin/execinfo.d \
@@ -806,35 +813,39 @@  DRUNTIME_DSOURCES_DARWIN = core/sys/darwin/crt_externs.d \
 	core/sys/darwin/mach/kern_return.d core/sys/darwin/mach/loader.d \
 	core/sys/darwin/mach/port.d core/sys/darwin/mach/semaphore.d \
 	core/sys/darwin/mach/thread_act.d core/sys/darwin/netinet/in_.d \
-	core/sys/darwin/pthread.d core/sys/darwin/sys/cdefs.d \
-	core/sys/darwin/sys/event.d core/sys/darwin/sys/mman.d
+	core/sys/darwin/pthread.d core/sys/darwin/string.d \
+	core/sys/darwin/sys/cdefs.d core/sys/darwin/sys/event.d \
+	core/sys/darwin/sys/mman.d
 
 DRUNTIME_DSOURCES_DRAGONFLYBSD = core/sys/dragonflybsd/dlfcn.d \
 	core/sys/dragonflybsd/execinfo.d core/sys/dragonflybsd/netinet/in_.d \
-	core/sys/dragonflybsd/pthread_np.d core/sys/dragonflybsd/sys/_bitset.d \
+	core/sys/dragonflybsd/pthread_np.d core/sys/dragonflybsd/string.d \
+	core/sys/dragonflybsd/sys/_bitset.d \
 	core/sys/dragonflybsd/sys/_cpuset.d core/sys/dragonflybsd/sys/cdefs.d \
 	core/sys/dragonflybsd/sys/elf.d core/sys/dragonflybsd/sys/elf32.d \
 	core/sys/dragonflybsd/sys/elf64.d \
 	core/sys/dragonflybsd/sys/elf_common.d \
 	core/sys/dragonflybsd/sys/event.d core/sys/dragonflybsd/sys/link_elf.d \
-	core/sys/dragonflybsd/sys/mman.d core/sys/dragonflybsd/time.d
+	core/sys/dragonflybsd/sys/mman.d core/sys/dragonflybsd/sys/socket.d \
+	core/sys/dragonflybsd/time.d
 
 DRUNTIME_DSOURCES_FREEBSD = core/sys/freebsd/dlfcn.d \
 	core/sys/freebsd/execinfo.d core/sys/freebsd/netinet/in_.d \
-	core/sys/freebsd/pthread_np.d core/sys/freebsd/sys/_bitset.d \
-	core/sys/freebsd/sys/_cpuset.d core/sys/freebsd/sys/cdefs.d \
-	core/sys/freebsd/sys/elf.d core/sys/freebsd/sys/elf32.d \
-	core/sys/freebsd/sys/elf64.d core/sys/freebsd/sys/elf_common.d \
-	core/sys/freebsd/sys/event.d core/sys/freebsd/sys/link_elf.d \
-	core/sys/freebsd/sys/mman.d core/sys/freebsd/sys/mount.d \
-	core/sys/freebsd/time.d core/sys/freebsd/unistd.d
+	core/sys/freebsd/pthread_np.d core/sys/freebsd/string.d \
+	core/sys/freebsd/sys/_bitset.d core/sys/freebsd/sys/_cpuset.d \
+	core/sys/freebsd/sys/cdefs.d core/sys/freebsd/sys/elf.d \
+	core/sys/freebsd/sys/elf32.d core/sys/freebsd/sys/elf64.d \
+	core/sys/freebsd/sys/elf_common.d core/sys/freebsd/sys/event.d \
+	core/sys/freebsd/sys/link_elf.d core/sys/freebsd/sys/mman.d \
+	core/sys/freebsd/sys/mount.d core/sys/freebsd/time.d \
+	core/sys/freebsd/unistd.d
 
 DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
 	core/sys/linux/dlfcn.d core/sys/linux/elf.d core/sys/linux/epoll.d \
 	core/sys/linux/errno.d core/sys/linux/execinfo.d \
 	core/sys/linux/fcntl.d core/sys/linux/ifaddrs.d core/sys/linux/link.d \
 	core/sys/linux/netinet/in_.d core/sys/linux/netinet/tcp.d \
-	core/sys/linux/sched.d core/sys/linux/stdio.d \
+	core/sys/linux/sched.d core/sys/linux/stdio.d core/sys/linux/string.d \
 	core/sys/linux/sys/auxv.d core/sys/linux/sys/eventfd.d \
 	core/sys/linux/sys/file.d core/sys/linux/sys/inotify.d \
 	core/sys/linux/sys/mman.d core/sys/linux/sys/netinet/tcp.d \
@@ -845,17 +856,19 @@  DRUNTIME_DSOURCES_LINUX = core/sys/linux/config.d \
 	core/sys/linux/timerfd.d core/sys/linux/tipc.d core/sys/linux/unistd.d
 
 DRUNTIME_DSOURCES_NETBSD = core/sys/netbsd/dlfcn.d \
-	core/sys/netbsd/execinfo.d core/sys/netbsd/sys/elf.d \
-	core/sys/netbsd/sys/elf32.d core/sys/netbsd/sys/elf64.d \
-	core/sys/netbsd/sys/elf_common.d core/sys/netbsd/sys/event.d \
+	core/sys/netbsd/execinfo.d core/sys/netbsd/string.d \
+	core/sys/netbsd/sys/elf.d core/sys/netbsd/sys/elf32.d \
+	core/sys/netbsd/sys/elf64.d core/sys/netbsd/sys/elf_common.d \
+	core/sys/netbsd/sys/event.d core/sys/netbsd/sys/featuretest.d \
 	core/sys/netbsd/sys/link_elf.d core/sys/netbsd/sys/mman.d \
 	core/sys/netbsd/time.d
 
 DRUNTIME_DSOURCES_OPENBSD = core/sys/openbsd/dlfcn.d \
-	core/sys/openbsd/sys/cdefs.d core/sys/openbsd/sys/elf.d \
-	core/sys/openbsd/sys/elf32.d core/sys/openbsd/sys/elf64.d \
-	core/sys/openbsd/sys/elf_common.d core/sys/openbsd/sys/link_elf.d \
-	core/sys/openbsd/sys/mman.d core/sys/openbsd/time.d
+	core/sys/openbsd/string.d core/sys/openbsd/sys/cdefs.d \
+	core/sys/openbsd/sys/elf.d core/sys/openbsd/sys/elf32.d \
+	core/sys/openbsd/sys/elf64.d core/sys/openbsd/sys/elf_common.d \
+	core/sys/openbsd/sys/link_elf.d core/sys/openbsd/sys/mman.d \
+	core/sys/openbsd/time.d
 
 DRUNTIME_DSOURCES_POSIX = core/sys/posix/aio.d \
 	core/sys/posix/arpa/inet.d core/sys/posix/config.d \
@@ -1326,6 +1339,7 @@  core/sys/darwin/netinet/$(am__dirstamp):
 core/sys/darwin/netinet/in_.lo:  \
 	core/sys/darwin/netinet/$(am__dirstamp)
 core/sys/darwin/pthread.lo: core/sys/darwin/$(am__dirstamp)
+core/sys/darwin/string.lo: core/sys/darwin/$(am__dirstamp)
 core/sys/darwin/sys/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/darwin/sys
 	@: > core/sys/darwin/sys/$(am__dirstamp)
@@ -1345,6 +1359,8 @@  core/sys/dragonflybsd/netinet/in_.lo:  \
 	core/sys/dragonflybsd/netinet/$(am__dirstamp)
 core/sys/dragonflybsd/pthread_np.lo:  \
 	core/sys/dragonflybsd/$(am__dirstamp)
+core/sys/dragonflybsd/string.lo:  \
+	core/sys/dragonflybsd/$(am__dirstamp)
 core/sys/dragonflybsd/sys/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/dragonflybsd/sys
 	@: > core/sys/dragonflybsd/sys/$(am__dirstamp)
@@ -1368,11 +1384,14 @@  core/sys/dragonflybsd/sys/link_elf.lo:  \
 	core/sys/dragonflybsd/sys/$(am__dirstamp)
 core/sys/dragonflybsd/sys/mman.lo:  \
 	core/sys/dragonflybsd/sys/$(am__dirstamp)
+core/sys/dragonflybsd/sys/socket.lo:  \
+	core/sys/dragonflybsd/sys/$(am__dirstamp)
 core/sys/dragonflybsd/time.lo: core/sys/dragonflybsd/$(am__dirstamp)
 core/sys/bionic/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/bionic
 	@: > core/sys/bionic/$(am__dirstamp)
 core/sys/bionic/fcntl.lo: core/sys/bionic/$(am__dirstamp)
+core/sys/bionic/string.lo: core/sys/bionic/$(am__dirstamp)
 core/sys/bionic/unistd.lo: core/sys/bionic/$(am__dirstamp)
 core/sys/freebsd/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/freebsd
@@ -1385,6 +1404,7 @@  core/sys/freebsd/netinet/$(am__dirstamp):
 core/sys/freebsd/netinet/in_.lo:  \
 	core/sys/freebsd/netinet/$(am__dirstamp)
 core/sys/freebsd/pthread_np.lo: core/sys/freebsd/$(am__dirstamp)
+core/sys/freebsd/string.lo: core/sys/freebsd/$(am__dirstamp)
 core/sys/freebsd/sys/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/freebsd/sys
 	@: > core/sys/freebsd/sys/$(am__dirstamp)
@@ -1408,6 +1428,7 @@  core/sys/netbsd/$(am__dirstamp):
 	@: > core/sys/netbsd/$(am__dirstamp)
 core/sys/netbsd/dlfcn.lo: core/sys/netbsd/$(am__dirstamp)
 core/sys/netbsd/execinfo.lo: core/sys/netbsd/$(am__dirstamp)
+core/sys/netbsd/string.lo: core/sys/netbsd/$(am__dirstamp)
 core/sys/netbsd/sys/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/netbsd/sys
 	@: > core/sys/netbsd/sys/$(am__dirstamp)
@@ -1417,6 +1438,8 @@  core/sys/netbsd/sys/elf64.lo: core/sys/netbsd/sys/$(am__dirstamp)
 core/sys/netbsd/sys/elf_common.lo:  \
 	core/sys/netbsd/sys/$(am__dirstamp)
 core/sys/netbsd/sys/event.lo: core/sys/netbsd/sys/$(am__dirstamp)
+core/sys/netbsd/sys/featuretest.lo:  \
+	core/sys/netbsd/sys/$(am__dirstamp)
 core/sys/netbsd/sys/link_elf.lo: core/sys/netbsd/sys/$(am__dirstamp)
 core/sys/netbsd/sys/mman.lo: core/sys/netbsd/sys/$(am__dirstamp)
 core/sys/netbsd/time.lo: core/sys/netbsd/$(am__dirstamp)
@@ -1424,6 +1447,7 @@  core/sys/openbsd/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/openbsd
 	@: > core/sys/openbsd/$(am__dirstamp)
 core/sys/openbsd/dlfcn.lo: core/sys/openbsd/$(am__dirstamp)
+core/sys/openbsd/string.lo: core/sys/openbsd/$(am__dirstamp)
 core/sys/openbsd/sys/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/openbsd/sys
 	@: > core/sys/openbsd/sys/$(am__dirstamp)
@@ -1456,6 +1480,7 @@  core/sys/linux/netinet/in_.lo: core/sys/linux/netinet/$(am__dirstamp)
 core/sys/linux/netinet/tcp.lo: core/sys/linux/netinet/$(am__dirstamp)
 core/sys/linux/sched.lo: core/sys/linux/$(am__dirstamp)
 core/sys/linux/stdio.lo: core/sys/linux/$(am__dirstamp)
+core/sys/linux/string.lo: core/sys/linux/$(am__dirstamp)
 core/sys/linux/sys/$(am__dirstamp):
 	@$(MKDIR_P) core/sys/linux/sys
 	@: > core/sys/linux/sys/$(am__dirstamp)
diff --git a/libphobos/libdruntime/core/stdc/assert_.d b/libphobos/libdruntime/core/stdc/assert_.d
index e7bdd29984b..18af7132e38 100644
--- a/libphobos/libdruntime/core/stdc/assert_.d
+++ b/libphobos/libdruntime/core/stdc/assert_.d
@@ -63,7 +63,7 @@  else version (NetBSD)
 else version (OpenBSD)
 {
     /***
-     * Assert failure function in the NetBSD C library.
+     * Assert failure function in the OpenBSD C library.
      */
     void __assert(const(char)* file, int line, const(char)* exp);
     ///
diff --git a/libphobos/libdruntime/core/stdc/fenv.d b/libphobos/libdruntime/core/stdc/fenv.d
index a1a52141e24..e101bb249fb 100644
--- a/libphobos/libdruntime/core/stdc/fenv.d
+++ b/libphobos/libdruntime/core/stdc/fenv.d
@@ -249,16 +249,16 @@  else version (NetBSD)
         {
             struct _x87
             {
-                    ushort control;       /* Control word register */
+                    ushort control;     /* Control word register */
                     ushort unused1;
-                    ushort status;        /* Status word register */
+                    ushort status;      /* Status word register */
                     ushort unused2;
-                    ushort tag;           /* Tag word register */
+                    ushort tag;         /* Tag word register */
                     ushort unused3;
                     uint[4] others;     /* EIP, Pointer Selector, etc */
             };
             _x87 x87;
-            uint32_t mxcsr;                 /* Control and status register */
+            uint mxcsr;                 /* Control and status register */
         };
 
     }
@@ -375,7 +375,42 @@  else version (Solaris)
 }
 else version (CRuntime_Musl)
 {
-    version (X86_64)
+    version (AArch64)
+    {
+        struct fenv_t
+        {
+            uint __fpcr;
+            uint __fpsr;
+        }
+        alias uint fexcept_t;
+    }
+    else version (ARM)
+    {
+        struct fenv_t
+        {
+            c_ulong __cw;
+        }
+        alias c_ulong fexcept_t;
+    }
+    else version (IBMZ_Any)
+    {
+        alias uint fenv_t;
+        alias uint fexcept_t;
+    }
+    else version (MIPS_Any)
+    {
+        struct fenv_t
+        {
+            uint __cw;
+        }
+        alias ushort fexcept_t;
+    }
+    else version (PPC_Any)
+    {
+        alias double fenv_t;
+        alias uint fexcept_t;
+    }
+    else version (X86_Any)
     {
         struct fenv_t
         {
@@ -391,7 +426,8 @@  else version (CRuntime_Musl)
             uint   __data_offset;
             ushort __data_selector;
             ushort __unused5;
-            uint   __mxcsr;
+            version (X86_64)
+                uint __mxcsr;
         }
         alias ushort fexcept_t;
     }
diff --git a/libphobos/libdruntime/core/sys/bionic/string.d b/libphobos/libdruntime/core/sys/bionic/string.d
new file mode 100644
index 00000000000..cbee06c4efe
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/bionic/string.d
@@ -0,0 +1,17 @@ 
+/**
+  * D header file for Bionic string.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.bionic.string;
+
+public import core.stdc.string;
+
+version (CRuntime_Bionic):
+extern (C):
+nothrow:
+@nogc:
+
+pure void* memmem(return const void* haystack, size_t haystacklen, scope const void* needle, size_t needlelen);
diff --git a/libphobos/libdruntime/core/sys/darwin/mach/dyld.d b/libphobos/libdruntime/core/sys/darwin/mach/dyld.d
index cee31a44428..5bf5609a203 100644
--- a/libphobos/libdruntime/core/sys/darwin/mach/dyld.d
+++ b/libphobos/libdruntime/core/sys/darwin/mach/dyld.d
@@ -32,6 +32,7 @@  public import core.sys.darwin.mach.loader;
 uint         _dyld_image_count();
 const(char)* _dyld_get_image_name(uint image_index);
 mach_header* _dyld_get_image_header(uint image_index);
+intptr_t     _dyld_get_image_vmaddr_slide(uint image_index);
 void         _dyld_register_func_for_add_image(void function(in mach_header* mh, intptr_t vmaddr_slide));
 void         _dyld_register_func_for_remove_image(void function(in mach_header* mh, intptr_t vmaddr_slide));
 
diff --git a/libphobos/libdruntime/core/sys/darwin/mach/loader.d b/libphobos/libdruntime/core/sys/darwin/mach/loader.d
index 0330e55477f..af42485fd83 100644
--- a/libphobos/libdruntime/core/sys/darwin/mach/loader.d
+++ b/libphobos/libdruntime/core/sys/darwin/mach/loader.d
@@ -1,27 +1,36 @@ 
 /**
- * Copyright: Copyright Digital Mars 2010-2018.
- * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
- * Authors:   Jacob Carlborg
+ * This file describes the format of Mach-O object files.
+ *
+ * D header file for `mach-o/loader.h` from the macOS 10.15 SDK.
+ *
+ * Copyright: Copyright Digital Mars 2010-2019.
+ * License: $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
+ * Authors: Jacob Carlborg
  * Version: Initial created: Feb 20, 2010-2018
- * Source: $(DRUNTIMESRC core/sys/darwin/mach/_loade.d)
+ * Source: $(DRUNTIMESRC core/sys/darwin/mach/_loader.d)
  */
 module core.sys.darwin.mach.loader;
 
+import core.stdc.config;
+
 version (CoreDdoc)
 {
-    /// Represents the header of a Mach-O file for 32-bit architecture.
+    /**
+     * The 32-bit mach header appears at the very beginning of the object file
+     * for 32-bit architectures.
+     */
     struct mach_header
     {
-        /// The mach magic number identifier.
+        /// Mach magic number identifier.
         uint magic;
 
-        /// CPU specifier.
+        /// Cpu specifier.
         int cputype;
 
         /// Machine specifier.
         int cpusubtype;
 
-        /// The type of the file.
+        /// Type of file.
         uint filetype;
 
         /// Number of load commands.
@@ -34,19 +43,32 @@  version (CoreDdoc)
         uint flags;
     }
 
-    /// Represents the header of a Mach-O file for 64-bit architecture.
+    /// Constant for the magic field of the mach_header (32-bit architectures)
+    enum
+    {
+        /// The mach magic number
+        MH_MAGIC,
+
+        /// NXSwapInt(MH_MAGIC)
+        MH_CIGAM
+    }
+
+    /**
+     * The 64-bit mach header appears at the very beginning of object files for
+     * 64-bit architectures.
+     */
     struct mach_header_64
     {
-        /// The mach magic number identifier.
+        /// Mach magic number identifier.
         uint magic;
 
-        /// CPU specifier.
+        /// Cpu specifier.
         int cputype;
 
         /// Machine specifier.
         int cpusubtype;
 
-        /// The type of the file.
+        /// Type of file.
         uint filetype;
 
         /// Number of load commands.
@@ -62,89 +84,488 @@  version (CoreDdoc)
         uint reserved;
     }
 
-    ///
-    enum MH_MAGIC : uint;
+    /// Constant for the magic field of the mach_header_64 (64-bit architectures)
+    enum
+    {
+        /// The 64-bit mach magic number.
+        MH_MAGIC_64,
 
-    ///
-    enum MH_CIGAM : uint;
+        /// NXSwapInt(MH_MAGIC_64).
+        MH_CIGAM_64
+    }
 
-    ///
-    enum MH_MAGIC_64 : uint;
+    /**
+     * The layout of the file depends on the filetype. For all but the MH_OBJECT
+     * file type the segments are padded out and aligned on a segment alignment
+     * boundary for efficient demand pageing. The MH_EXECUTE, MH_FVMLIB,
+     * MH_DYLIB, MH_DYLINKER and MH_BUNDLE file types also have the headers
+     * included as part of their first segment.
+     *
+     * The file type MH_OBJECT is a compact format intended as output of the
+     * assembler and input (and possibly output) of the link editor (the .o
+     * format). All sections are in one unnamed segment with no segment padding.
+     * This format is used as an executable format when the file is so small the
+     * segment padding greatly increases its size.
+     *
+     * The file type MH_PRELOAD is an executable format intended for things that
+     * are not executed under the kernel (proms, stand alones, kernels, etc).
+     * The format can be executed under the kernel but may demand paged it and
+     * not preload it before execution.
+     *
+     * A core file is in MH_CORE format and can be any in an arbitrary legal
+     * Mach-O file.
+     *
+     * Constants for the filetype field of the mach_header
+     */
+    enum
+    {
+        /// Relocatable object file.
+        MH_OBJECT,
 
-    ///
-    enum MH_CIGAM_64 : uint;
+        /// Demand paged executable file.
+        MH_EXECUTE,
 
-    ///
-    enum SEG_PAGEZERO : string;
+        /// Fixed VM shared library file.
+        MH_FVMLIB,
 
-    ///
-    enum SEG_TEXT : string;
+        /// Core file.
+        MH_CORE,
 
-    ///
-    enum SECT_TEXT : string;
+        /// Preloaded executable file.
+        MH_PRELOAD,
 
-    ///
-    enum SECT_FVMLIB_INIT0 : string;
+        /// Dynamically bound shared library.
+        MH_DYLIB,
 
-    ///
-    enum SECT_FVMLIB_INIT1 : string;
+        /// Dynamic link editor.
+        MH_DYLINKER,
 
-    ///
-    enum SEG_DATA : string;
+        /// Dynamically bound bundle file.
+        MH_BUNDLE,
 
-    ///
-    enum SECT_DATA : string;
+        /// Shared library stub for static linking only, no section contents.
+        MH_DYLIB_STUB,
 
-    ///
-    enum SECT_BSS : string;
+        /// Companion file with only debug sections.
+        MH_DSYM,
 
-    ///
-    enum SECT_COMMON : string;
+        /// X86_64 kexts.
+        MH_KEXT_BUNDLE
+    }
 
-    ///
-    enum SEG_OBJC : string;
 
-    ///
-    enum SECT_OBJC_SYMBOLS : string;
+    /// Constants for the flags field of the mach_header
+    enum
+    {
+        /// The object file has no undefined references.
+        MH_NOUNDEFS,
 
-    ///
-    enum SECT_OBJC_MODULES : string;
+        /**
+         * The object file is the output of an incremental link against a base
+         * file and can't be link edited again.
+         */
+        MH_INCRLINK,
 
-    ///
-    enum SECT_OBJC_STRINGS : string;
+        /**
+         * The object file is input for the dynamic linker and can't be
+         * statically link edited again.
+         */
+        MH_DYLDLINK,
 
-    ///
-    enum SECT_OBJC_REFS : string;
+        /**
+         * The object file's undefined references are bound by the dynamic
+         * linker when loaded.
+         */
+        MH_BINDATLOAD,
+
+        /// The file has its dynamic undefined references prebound.
+        MH_PREBOUND,
 
-    ///
-    enum SEG_ICON : string;
+        /// The file has its read-only and read-write segments split.
+        MH_SPLIT_SEGS,
 
-    ///
-    enum SECT_ICON_HEADER : string;
+        /**
+         * The shared library init routine is to be run lazily via catching
+         * memory faults to its writeable segments (obsolete).
+         */
+        MH_LAZY_INIT,
 
-    ///
-    enum SECT_ICON_TIFF : string;
+        /// The image is using two-level name space bindings.
+        MH_TWOLEVEL,
 
-    ///
-    enum SEG_LINKEDIT : string;
+        /// The executable is forcing all images to use flat name space bindings.
+        MH_FORCE_FLAT,
+
+        /**
+         * This umbrella guarantees no multiple definitions of symbols in its
+         * sub-images so the two-level namespace hints can always be used.
+         */
+        MH_NOMULTIDEFS,
+
+        /// Do not have dyld notify the prebinding agent about this executable.
+        MH_NOFIXPREBINDING,
+
+        /**
+         * The binary is not prebound but can have its prebinding redone. only
+         * used when MH_PREBOUND is not set.
+         */
+        MH_PREBINDABLE,
+
+        /**
+         * Indicates that this binary binds to all two-level namespace modules
+         * of its dependent libraries. only used when MH_PREBINDABLE and
+         * MH_TWOLEVEL are both set.
+         */
+        MH_ALLMODSBOUND,
+
+        /**
+         * Safe to divide up the sections into sub-sections via symbols for dead
+         * code stripping.
+         */
+        MH_SUBSECTIONS_VIA_SYMBOLS,
+
+        /// The binary has been canonicalized via the unprebind operation.
+        MH_CANONICAL,
+
+        /// The final linked image contains external weak symbols.
+        MH_WEAK_DEFINES,
+
+        /// The final linked image uses weak symbols.
+        MH_BINDS_TO_WEAK,
+
+
+
+        /**
+         * When this bit is set, all stacks in the task will be given stack
+         * execution privilege. Only used in MH_EXECUTE filetypes.
+         */
+        MH_ALLOW_STACK_EXECUTION,
+
+        /**
+         * When this bit is set, the binary declares it is safe for use in
+         * processes with uid zero.
+         */
+        MH_ROOT_SAFE,
+
+
+
+        /**
+         * When this bit is set, the binary declares it is safe for use in
+         * processes when issetugid() is true.
+         */
+        MH_SETUID_SAFE,
+
+
+
+        /**
+         * When this bit is set on a dylib, the static linker does not need to
+         * examine dependent dylibs to see if any are re-exported.
+         */
+        MH_NO_REEXPORTED_DYLIBS,
+
+        /**
+         * When this bit is set, the OS will load the main executable at a
+         * random address. Only used in MH_EXECUTE filetypes.
+         */
+        MH_PIE,
+
+        /**
+         * Only for use on dylibs. When linking against a dylib that has this
+         * bit set, the static linker will automatically not create a
+         * LC_LOAD_DYLIB load command to the dylib if no symbols are being
+         * referenced from the dylib..
+         */
+        MH_DEAD_STRIPPABLE_DYLIB,
+
+        /// Contains a section of type S_THREAD_LOCAL_VARIABLES.
+        MH_HAS_TLV_DESCRIPTORS,
+
+
+
+        /**
+         * When this bit is set, the OS will run the main executable with a
+         * non-executable heap even on platforms (e.g. i386) that don't require
+         * it. Only used in MH_EXECUTE filetypes.
+         */
+        MH_NO_HEAP_EXECUTION,
+
+
+
+        /// The code was linked for use in an application extension..
+        MH_APP_EXTENSION_SAFE,
+
+
+
+        /**
+         * The external symbols listed in the nlist symbol table do not include
+         * all the symbols listed in the dyld info.
+         */
+        MH_NLIST_OUTOFSYNC_WITH_DYLDINFO,
+
+        /**
+         * Allow LC_MIN_VERSION_MACOS and LC_BUILD_VERSION load commands with
+         * the platforms macOS, iOSMac, iOSSimulator, tvOSSimulator and
+         * watchOSSimulator.
+         */
+        MH_SIM_SUPPORT,
+
+        /**
+         * Only for use on dylibs. When this bit is set, the dylib is part of
+         * the dyld shared cache, rather than loose in the filesystem.
+         */
+        MH_DYLIB_IN_CACHE
+    }
+
+    /**
+     * The load commands directly follow the mach_header. The total size of all
+     * of the commands is given by the sizeofcmds field in the mach_header. All
+     * load commands must have as their first two fields cmd and cmdsize. The
+     * cmd field is filled in with a constant for that command type. Each
+     * command type has a structure specifically for it. The cmdsize field is
+     * the size in bytes of the particular load command structure plus anything
+     * that follows it that is a part of the load command
+     * (i.e. section structures, strings, etc.). To advance to the next load
+     * command the cmdsize can be added to the offset or pointer of the current
+     * load command. The cmdsize for 32-bit architectures MUST be a multiple of
+     * 4 bytes and for 64-bit architectures MUST be a multiple of 8 bytes
+     * (these are forever the maximum alignment of any load commands). The
+     * padded bytes must be zero. All tables in the object file must also
+     * follow these rules so the file can be memory mapped. Otherwise the
+     * pointers to these tables will not work well or at all on some machines.
+     * With all padding zeroed like objects will compare byte for byte.
+     */
+    struct load_command
+    {
+        /// Type of load command.
+        uint cmd;
+
+        /// Total size of command in bytes.
+        uint cmdsize;
+    }
+
+    /**
+     * After MacOS X 10.1 when a new load command is added that is required to
+     * be understood by the dynamic linker for the image to execute properly the
+     * LC_REQ_DYLD bit will be or'ed into the load command constant. If the
+     * dynamic linker sees such a load command it it does not understand will
+     * issue a "unknown load command required for execution" error and refuse to
+     * use the image. Other load commands without this bit that are not
+     * understood will simply be ignored.
+     */
+    enum LC_REQ_DYLD;
+
+    /// Constants for the cmd field of all load commands, the type.
+    enum
+    {
+        /// Segment of this file to be mapped.
+        LC_SEGMENT,
+
+        /// Link-edit stab symbol table info.
+        LC_SYMTAB,
+
+        /// Link-edit gdb symbol table info (obsolete).
+        LC_SYMSEG,
+
+        /// Thread.
+        LC_THREAD,
+
+        /// Unix thread (includes a stack).
+        LC_UNIXTHREAD,
+
+        /// Load a specified fixed VM shared library.
+        LC_LOADFVMLIB,
+
+        /// Fixed VM shared library identification.
+        LC_IDFVMLIB,
+
+        /// Object identification info (obsolete).
+        LC_IDENT,
+
+        /// Fixed VM file inclusion (internal use).
+        LC_FVMFILE,
+
+        /// Prepage command (internal use).
+        LC_PREPAGE,
+
+        /// Dynamic link-edit symbol table info.
+        LC_DYSYMTAB,
+
+        /// Load a dynamically linked shared library.
+        LC_LOAD_DYLIB,
+
+        /// Dynamically linked shared lib ident.
+        LC_ID_DYLIB,
+
+        /// Load a dynamic linker.
+        LC_LOAD_DYLINKER,
+
+        /// Dynamic linker identification.
+        LC_ID_DYLINKER,
+
+        /// Modules prebound for a dynamically linked shared library.
+        LC_PREBOUND_DYLIB,
+
+        /// Image routines.
+        LC_ROUTINES,
+
+        /// Sub framework.
+        LC_SUB_FRAMEWORK,
+
+        /// Sub umbrella.
+        LC_SUB_UMBRELLA,
+
+        /// Sub client.
+        LC_SUB_CLIENT,
+
+        /// Sub library.
+        LC_SUB_LIBRARY,
+
+        /// Two-level namespace lookup hints.
+        LC_TWOLEVEL_HINTS,
+
+        /// Prebind checksum.
+        LC_PREBIND_CKSUM
+    }
 
+
+    /**
+     * Load a dynamically linked shared library that is allowed to be missing
+     * (all symbols are weak imported).
+     */
     ///
-    enum SEG_UNIXSTACK : string;
+    enum LC_LOAD_WEAK_DYLIB;
 
     ///
-    enum SEG_IMPORT : string;
+    enum
+    {
+        /// 64-bit segment of this file to be mapped.
+        LC_SEGMENT_64,
+
+        /// 64-bit image routines.
+        LC_ROUTINES_64,
+
+        /// The uuid.
+        LC_UUID,
+
+        /// Runpath additions.
+        LC_RPATH,
+
+        /// Local of code signature.
+        LC_CODE_SIGNATURE,
+
+        /// Local of info to split segments.
+        LC_SEGMENT_SPLIT_INFO,
+
+        /// Load and re-export dylib.
+        LC_REEXPORT_DYLIB,
+
+        /// Delay load of dylib until first use.
+        LC_LAZY_LOAD_DYLIB,
+
+        /// Encrypted segment information.
+        LC_ENCRYPTION_INFO,
+
+        /// Compressed dyld information.
+        LC_DYLD_INFO,
+
+        /// Compressed dyld information only.
+        LC_DYLD_INFO_ONLY,
+
+        /// Load upward dylib.
+        LC_LOAD_UPWARD_DYLIB,
+
+        /// Build for MacOSX min OS version.
+        LC_VERSION_MIN_MACOSX,
+
+        /// Build for iPhoneOS min OS version.
+        LC_VERSION_MIN_IPHONEOS,
+
+        /// Compressed table of function start addresses.
+        LC_FUNCTION_STARTS,
+
+        /// String for dyld to treat like environment variable.
+        LC_DYLD_ENVIRONMENT,
+
+        /// Replacement for LC_UNIXTHREAD.
+        LC_MAIN,
+
+        /// Table of non-instructions in __text.
+        LC_DATA_IN_CODE,
+
+        /// Source version used to build binary.
+        LC_SOURCE_VERSION,
+
+        /// Code signing DRs copied from linked dylibs.
+        LC_DYLIB_CODE_SIGN_DRS,
+
+        /// 64-bit encrypted segment information.
+        LC_ENCRYPTION_INFO_64,
+
+        /// Linker options in MH_OBJECT files.
+        LC_LINKER_OPTION,
+
+        /// Optimization hints in MH_OBJECT files.
+        LC_LINKER_OPTIMIZATION_HINT,
+
+        /// Build for AppleTV min OS version.
+        LC_VERSION_MIN_TVOS,
+
+        /// Build for Watch min OS version.
+        LC_VERSION_MIN_WATCHOS,
+
+        /// Arbitrary data included within a Mach-O file.
+        LC_NOTE,
+
+        /// Build for platform min OS version.
+        LC_BUILD_VERSION,
+
+        /// Used with linkedit_data_command, payload is trie.
+        LC_DYLD_EXPORTS_TRIE,
+
+        /// Used with linkedit_data_command.
+        LC_DYLD_CHAINED_FIXUPS
+    }
+
 
-    /// Represents a segment command in a Mach-O file for 32-bit architecture.
+    /**
+     * A variable length string in a load command is represented by an lc_str
+     * union. The strings are stored just after the load command structure and
+     * the offset is from the start of the load command structure. The size
+     * of the string is reflected in the cmdsize field of the load command.
+     * Once again any padded bytes to bring the cmdsize field to a multiple
+     * of 4 bytes must be zero.
+     */
+    union lc_str
+    {
+        /// Offset to the string.
+        uint offset;
+
+        /// Pointer to the string (only available on non 64 bit platforms).
+        char* ptr;
+    }
+
+    /**
+     * The segment load command indicates that a part of this file is to be
+     * mapped into the task's address space. The size of this segment in memory,
+     * vmsize, maybe equal to or larger than the amount to map from this file,
+     * filesize. The file is mapped starting at fileoff to the beginning of
+     * the segment in memory, vmaddr. The rest of the memory of the segment,
+     * if any, is allocated zero fill on demand. The segment's maximum virtual
+     * memory protection and initial virtual memory protection are specified
+     * by the maxprot and initprot fields. If the segment has sections then the
+     * section structures directly follow the segment command and their size is
+     * reflected in cmdsize.
+     */
     struct segment_command
     {
-        /// Type of load command, i.e. `LC_SEGMENT`.
+        /// LC_SEGMENT.
         uint cmd;
 
-        /// The size of this segment, includes size of section structs.
+        /// Includes sizeof section structs.
         uint cmdsize;
 
-        /// The name of this segment.
-        char[16] segname = 0;
+        /// Segment name.
+        char[16] segname;
 
         /// Memory address of this segment.
         uint vmaddr;
@@ -164,36 +585,41 @@  version (CoreDdoc)
         /// Initial VM protection.
         int initprot;
 
-        /// Number of sections in this segment.
+        /// Number of sections in segment.
         uint nsects;
 
         /// Flags.
         uint flags;
     }
 
-    /// Represents a segment command in a Mach-O file for 64-bit architecture.
+    /*
+     * The 64-bit segment load command indicates that a part of this file is to
+     * be mapped into a 64-bit task's address space. If the 64-bit segment has
+     * sections then section_64 structures directly follow the 64-bit segment
+     * command and their size is reflected in cmdsize.
+     */
     struct segment_command_64
     {
-        /// Type of load command, i.e. `LC_SEGMENT`.
+        /// LC_SEGMENT_64.
         uint cmd;
 
-        /// The size of this segment, includes size of section structs.
+        /// Includes sizeof section_64 structs.
         uint cmdsize;
 
-        /// The name of this segment.
-        char[16] segname = 0;
+        /// Segment name.
+        char[16] segname;
 
         /// Memory address of this segment.
-        long vmaddr;
+        ulong vmaddr;
 
         /// Memory size of this segment.
-        long vmsize;
+        ulong vmsize;
 
         /// File offset of this segment.
-        long fileoff;
+        ulong fileoff;
 
         /// Amount to map from the file.
-        long filesize;
+        ulong filesize;
 
         /// Maximum VM protection.
         int maxprot;
@@ -201,210 +627,2822 @@  version (CoreDdoc)
         /// Initial VM protection.
         int initprot;
 
-        /// Number of sections in this segment.
+        /// Number of sections in segment.
         uint nsects;
 
         /// Flags.
         uint flags;
     }
 
-    /// Represents a section in a Mach-O file for 32-bit architecture.
+    /// Constants for the flags field of the segment_command.
+    enum
+    {
+        /**
+         * The file contents for this segment is for the high part of the VM
+         * space, the low part is zero filled (for stacks in core files).
+         */
+        SG_HIGHVM,
+
+        /**
+         * This segment is the VM that is allocated by a fixed VM library,
+         * for overlap checking in the link editor.
+         */
+        SG_FVMLIB,
+
+        /**
+         * This segment has nothing that was relocated in it and nothing
+         * relocated to it, that is it maybe safely replaced without relocation.
+         */
+        SG_NORELOC,
+
+        /**
+         * This segment is protected.
+         *
+         * If the segment starts at file offset 0, the first page of the segment
+         * is not protected. All other pages of the segment are protected.
+         */
+        SG_PROTECTED_VERSION_1,
+
+        /// This segment is made read-only after fixups.
+        SG_READ_ONLY
+    }
+
+
+    /**
+     * A segment is made up of zero or more sections. Non-MH_OBJECT files have
+     * all of their segments with the proper sections in each, and padded to the
+     * specified segment alignment when produced by the link editor. The first
+     * segment of a MH_EXECUTE and MH_FVMLIB format file contains the
+     * mach_header and load commands of the object file before its first
+     * section. The zero fill sections are always last in their segment
+     * (in all formats). This allows the zeroroed segment padding to be mapped
+     * into memory where zero fill sections might be. The gigabyte zero fill
+     * sections, those with the section type S_GB_ZEROFILL, can only be in a
+     * segment with sections of this type. These segments are then placed after
+     * all other segments.
+     *
+     * The MH_OBJECT format has all of its sections in one segment for
+     * compactness. There is no padding to a specified segment boundary and the
+     * mach_header and load commands are not part of the segment.
+     *
+     * Sections with the same section name, sectname, going into the same
+     * segment, segname, are combined by the link editor. The resulting section,
+     * is aligned to the maximum alignment of the combined sections and is the
+     * new section's alignment. The combined sections are aligned to their
+     * original alignment in the combined section. Any padded bytes to get the
+     * specified alignment are zeroed.
+     *
+     * The format of the relocation entries referenced by the reloff and nreloc
+     * fields of the section structure for mach object files is described in the
+     * header file <reloc.h>.
+     */
     struct section
     {
-        /// The name of this this section.
-        char[16] sectname = 0;
+        /// Name of this section.
+        char[16] sectname;
 
-        /// The name of the segment this section belongs to.
-        char[16] segname = 0;
+        /// Segment this section goes in.
+        char[16] segname;
 
-        /// The memory address of this section.
+        /// Memory address of this section.
         uint addr;
 
-        /// The size of this section in bytes.
+        /// Size in bytes of this section.
         uint size;
 
-        /// The file offset of this section.
+        /// File offset of this section.
         uint offset;
 
-        /// The alignment (power of two) of this section.
+        /// Section alignment (power of 2).
         uint align_;
 
-        /// The file offset of the relocation entries.
+        /// File offset of relocation entries.
         uint reloff;
 
-        /// The number of relocation entries.
+        /// Number of relocation entries.
         uint nreloc;
 
-        /// Flags, section type and attributes.
+        /// Flags (section type and attributes).
         uint flags;
 
-        /// Reserved.
+        /// Reserved (for offset or index).
         uint reserved1;
 
-        /// Reserved.
+        /// Reserved (for count or sizeof).
         uint reserved2;
     }
 
-    /// Represents a section in a Mach-O file for 64-bit architecture.
+    ///
     struct section_64
     {
-        /// The name of this this section.
-        char[16] sectname = 0;
+        /// Name of this section.
+        char[16] sectname;
 
-        /// The name of the segment this section belongs to.
-        char[16] segname = 0;
+        /// Segment this section goes in.
+        char[16] segname;
 
-        /// The memory address of this section.
+        /// Memory address of this section.
         ulong addr;
 
-        /// The size of this section in bytes.
+        /// Size in bytes of this section.
         ulong size;
 
-        /// The file offset of this section.
+        /// File offset of this section.
         uint offset;
 
-        /// The alignment (power of two) of this section.
+        /// Section alignment (power of 2).
         uint align_;
 
-        /// The file offset of the relocation entries.
+        /// File offset of relocation entries.
         uint reloff;
 
-        /// The number of relocation entries.
+        /// Number of relocation entries.
         uint nreloc;
 
-        /// Flags, section type and attributes.
+        /// Flags (section type and attributes).
         uint flags;
 
-        /// Reserved.
+        /// Reserved (for offset or index).
         uint reserved1;
 
-        /// Reserved.
+        /// Reserved (for count or sizeof).
         uint reserved2;
 
         /// Reserved.
         uint reserved3;
     }
-}
 
-else version (OSX)
-    version = Darwin;
-else version (iOS)
-    version = Darwin;
-else version (TVOS)
-    version = Darwin;
-else version (WatchOS)
-    version = Darwin;
+    /**
+     * The flags field of a section structure is separated into two parts a section
+     * type and section attributes. The section types are mutually exclusive (it
+     * can only have one type) but the section attributes are not (it may have more
+     * than one attribute).
+     */
+    enum
+    {
+        /// 256 section types.
+        SECTION_TYPE,
 
-version (Darwin):
-extern (C):
+        /// 24 section attributes.
+        SECTION_ATTRIBUTES
+    }
 
-struct mach_header
-{
-    uint magic;
-    int  cputype;
-    int  cpusubtype;
-    uint filetype;
-    uint ncmds;
-    uint sizeofcmds;
-    uint flags;
-}
+    /// Constants for the type of a section.
+    enum
+    {
+        /// Regular section.
+        S_REGULAR,
 
-struct mach_header_64
-{
-    uint magic;
-    int  cputype;
-    int  cpusubtype;
-    uint filetype;
-    uint ncmds;
-    uint sizeofcmds;
-    uint flags;
-    uint reserved;
-}
+        /// Zero fill on demand section.
+        S_ZEROFILL,
 
-enum uint MH_MAGIC      = 0xfeedface;
-enum uint MH_CIGAM      = 0xcefaedfe;
-enum uint MH_MAGIC_64   = 0xfeedfacf;
-enum uint MH_CIGAM_64   = 0xcffaedfe;
-
-enum SEG_PAGEZERO       = "__PAGEZERO";
-enum SEG_TEXT           = "__TEXT";
-enum SECT_TEXT          = "__text";
-enum SECT_FVMLIB_INIT0  = "__fvmlib_init0";
-enum SECT_FVMLIB_INIT1  = "__fvmlib_init1";
-enum SEG_DATA           = "__DATA";
-enum SECT_DATA          = "__data";
-enum SECT_BSS           = "__bss";
-enum SECT_COMMON        = "__common";
-enum SEG_OBJC           = "__OBJC";
-enum SECT_OBJC_SYMBOLS  = "__symbol_table";
-enum SECT_OBJC_MODULES  = "__module_info";
-enum SECT_OBJC_STRINGS  = "__selector_strs";
-enum SECT_OBJC_REFS     = "__selector_refs";
-enum SEG_ICON           = "__ICON";
-enum SECT_ICON_HEADER   = "__header";
-enum SECT_ICON_TIFF     = "__tiff";
-enum SEG_LINKEDIT       = "__LINKEDIT";
-enum SEG_UNIXSTACK      = "__UNIXSTACK";
-enum SEG_IMPORT         = "__IMPORT";
+        /// Section with only literal C strings.
+        S_CSTRING_LITERALS,
 
-struct segment_command
-{
-    uint cmd;
-    uint cmdsize;
-    char[16] segname = 0;
-    uint vmaddr;
-    uint vmsize;
-    uint fileoff;
-    uint filesize;
-    int maxprot;
-    int initprot;
-    uint nsects;
-    uint flags;
-}
+        /// Section with only 4 byte literals.
+        S_4BYTE_LITERALS,
 
-struct segment_command_64
-{
-    uint cmd;
-    uint cmdsize;
-    char[16] segname = 0;
-    long vmaddr;
-    long vmsize;
-    long fileoff;
-    long filesize;
-    int maxprot;
-    int initprot;
-    uint nsects;
-    uint flags;
-}
+        /// Section with only 8 byte literals.
+        S_8BYTE_LITERALS,
 
-struct section
-{
-    char[16] sectname = 0;
-    char[16] segname = 0;
-    uint     addr;
-    uint     size;
-    uint     offset;
-    uint     align_;
-    uint     reloff;
-    uint     nreloc;
-    uint     flags;
-    uint     reserved1;
-    uint     reserved2;
-}
+        /// Section with only pointers to literals.
+        S_LITERAL_POINTERS,
+
+        /**
+         * Section with only non-lazy symbol pointers.
+         *
+         * For the two types of symbol pointers sections and the symbol stubs
+         * section they have indirect symbol table entries. For each of the
+         * entries in the section the indirect symbol table entries, in
+         * corresponding order in the indirect symbol table, start at the index
+         * stored in the reserved1 field of the section structure. Since the
+         * indirect symbol table entries correspond to the entries in the
+         * section the number of indirect symbol table entries is inferred from
+         * the size of the section divided by the size of the entries in the
+         * section. For symbol pointers sections the size of the entries in the
+         * section is 4 bytes and for symbol stubs sections the byte size of the
+         * stubs is stored in the reserved2 field of the section structure.
+         */
+        S_NON_LAZY_SYMBOL_POINTERS,
+
+        /// Section with only lazy symbol pointers.
+        S_LAZY_SYMBOL_POINTERS,
+
+        /// Section with only symbol stubs, byte size of stub in the reserved2 field.
+        S_SYMBOL_STUBS,
+
+        /// Section with only function pointers for initialization.
+        S_MOD_INIT_FUNC_POINTERS,
+
+        /// Section with only function pointers for termination.
+        S_MOD_TERM_FUNC_POINTERS,
+
+        /// Section contains symbols that are to be coalesced.
+        S_COALESCED,
+
+        /// Zero fill on demand section (that can be larger than 4 gigabytes).
+        S_GB_ZEROFILL,
+
+        /// Section with only pairs of function pointers for interposing.
+        S_INTERPOSING,
+
+        /// Section with only 16 byte literals.
+        S_16BYTE_LITERALS,
+
+        /// Section contains DTrace Object Format.
+        S_DTRACE_DOF,
+
+        /// Section with only lazy symbol pointers to lazy loaded dylibs.
+        S_LAZY_DYLIB_SYMBOL_POINTERS,
+
+
+
+        // Section types to support thread local variables.
+
+        /// Template of initial values for TLVs.
+        S_THREAD_LOCAL_REGULAR,
+
+        /// Template of initial values for TLVs.
+        S_THREAD_LOCAL_ZEROFILL,
+
+        /// TLV descriptors.
+        S_THREAD_LOCAL_VARIABLES,
+
+        /// Pointers to TLV descriptors.
+        S_THREAD_LOCAL_VARIABLE_POINTERS,
+
+        /// Functions to call to initialize TLV values.
+        S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
+
+        /// 32-bit offsets to initializers.
+        S_INIT_FUNC_OFFSETS
+    }
+
+    /**
+     * Constants for the section attributes part of the flags field of a section
+     * structure.
+     */
+    enum
+    {
+        /// User setable attributes.
+        SECTION_ATTRIBUTES_USR,
+
+        /// Section contains only true machine instructions.
+        S_ATTR_PURE_INSTRUCTIONS,
+
+        /// Section contains coalesced symbols that are not to be in a ranlib table of contents.
+        S_ATTR_NO_TOC,
+
+        /// Ok to strip static symbols in this section in files with the MH_DYLDLINK flag.
+        S_ATTR_STRIP_STATIC_SYMS,
+
+        /// No dead stripping.
+        S_ATTR_NO_DEAD_STRIP,
+
+        /// Blocks are live if they reference live blocks.
+        S_ATTR_LIVE_SUPPORT,
+
+        /// Used with i386 code stubs written on by dyld.
+        S_ATTR_SELF_MODIFYING_CODE,
+
+        /**
+         * A debug section.
+         *
+         * If a segment contains any sections marked with S_ATTR_DEBUG then all
+         * sections in that segment must have this attribute. No section other
+         * than a section marked with this attribute may reference the contents
+         * of this section. A section with this attribute may contain no symbols
+         * and must have a section type S_REGULAR. The static linker will not
+         * copy section contents from sections with this attribute into its
+         * output file. These sections generally contain DWARF debugging info.
+         */
+        S_ATTR_DEBUG,
+
+        /// System setable attributes.
+        SECTION_ATTRIBUTES_SYS,
+
+        /// Section contains some machine instructions.
+        S_ATTR_SOME_INSTRUCTIONS,
+
+        /// Section has external relocation entries.
+        S_ATTR_EXT_RELOC,
+
+        /// Section has local relocation entries.
+        S_ATTR_LOC_RELOC
+    }
+
+    /**
+     * The names of segments and sections in them are mostly meaningless to the
+     * link-editor. But there are few things to support traditional UNIX
+     * executables that require the link-editor and assembler to use some names
+     * agreed upon by convention.
+     *
+     * The initial protection of the "__TEXT" segment has write protection
+     * turned off (not writeable).
+     *
+     * The link-editor will allocate common symbols at the end of the "__common"
+     * section in the "__DATA" segment. It will create the section and segment
+     * if needed.
+     *
+     * The currently known segment names and the section names in those segments.
+     */
+    enum
+    {
+        /**
+         * The pagezero segment which has no protections and catches NULL
+         * references for MH_EXECUTE files.
+         */
+        SEG_PAGEZERO,
+
+
+
+        /// The tradition UNIX text segment.
+        SEG_TEXT,
+
+        /// The real text part of the text section no headers, and no padding.
+        SECT_TEXT,
+
+        /// The fvmlib initialization section.
+        SECT_FVMLIB_INIT0,
+
+        /// The section following the fvmlib initialization section.
+        SECT_FVMLIB_INIT1,
+
+
+
+        /// The tradition UNIX data segment.
+        SEG_DATA,
+
+        /// The real initialized data section no padding, no bss overlap.
+        SECT_DATA,
+
+        /// The real uninitialized data section no padding.
+        SECT_BSS,
+
+        /// The section common symbols are allocated in by the link editor.
+        SECT_COMMON,
 
-struct section_64
-{
-    char[16] sectname = 0;
-    char[16] segname = 0;
-    ulong    addr;
-    ulong    size;
-    uint     offset;
-    uint     align_;
-    uint     reloff;
-    uint     nreloc;
-    uint     flags;
-    uint     reserved1;
-    uint     reserved2;
-    uint     reserved3;
-}
 
+
+        /// Objective-C runtime segment.
+        SEG_OBJC,
+
+        /// Symbol table.
+        SECT_OBJC_SYMBOLS,
+
+        /// Module information.
+        SECT_OBJC_MODULES,
+
+        /// String table.
+        SECT_OBJC_STRINGS,
+
+        /// String table.
+        SECT_OBJC_REFS,
+
+
+
+        /// The icon segment.
+        SEG_ICON,
+
+        /// The icon headers.
+        SECT_ICON_HEADER,
+
+        /// The icons in tiff format.
+        SECT_ICON_TIFF,
+
+
+
+        /**
+         * The segment containing all structs created and maintained by the link
+         * editor. Created with -seglinkedit option to ld(1) for MH_EXECUTE and
+         * FVMLIB file types only.
+         */
+        SEG_LINKEDIT,
+
+
+        /// The unix stack segment.
+        SEG_UNIXSTACK,
+
+
+        /**
+         * The segment for the self (dyld) modifing code stubs that has read,
+         * write and execute permissions.
+         */
+        SEG_IMPORT
+    }
+
+    /**
+     * Fixed virtual memory shared libraries are identified by two things. The
+     * target pathname (the name of the library as found for execution), and the
+     * minor version number. The address of where the headers are loaded is in
+     * header_addr. (THIS IS OBSOLETE and no longer supported).
+     */
+    struct fvmlib
+    {
+        /// Library's target pathname.
+        lc_str name;
+
+        /// Library's minor version number.
+        uint minor_version;
+
+        /// Library's header address.
+        uint header_addr;
+    }
+
+    /**
+     * A fixed virtual shared library (filetype == MH_FVMLIB in the mach header)
+     * contains a fvmlib_command (cmd == LC_IDFVMLIB) to identify the library.
+     * An object that uses a fixed virtual shared library also contains a
+     * fvmlib_command (cmd == LC_LOADFVMLIB) for each library it uses.
+     * (THIS IS OBSOLETE and no longer supported).
+     */
+    struct fvmlib_command
+    {
+        /// LC_IDFVMLIB or LC_LOADFVMLIB.
+        uint cmd;
+
+        /// Includes pathname string.
+        uint cmdsize;
+
+        /// The library identification.
+        fvmlib fvmlib_;
+    }
+
+    /**
+     * Dynamically linked shared libraries are identified by two things. The
+     * pathname (the name of the library as found for execution), and the
+     * compatibility version number. The pathname must match and the
+     * compatibility number in the user of the library must be greater than or
+     * equal to the library being used. The time stamp is used to record the
+     * time a library was built and copied into user so it can be use to
+     * determined if the library used at runtime is exactly the same as used to
+     * built the program.
+     */
+    struct dylib
+    {
+        /// Library's path name.
+        lc_str name;
+
+        /// Library's build time stamp.
+        uint timestamp;
+
+        /// Library's current version number.
+        uint current_version;
+
+        /// Library's compatibility version number.
+        uint compatibility_version;
+    }
+
+    /**
+     * A dynamically linked shared library
+     * (filetype == MH_DYLIB in the mach header) contains a dylib_command
+     * (cmd == LC_ID_DYLIB) to identify the library. An object that uses a
+     * dynamically linked shared library also contains a dylib_command
+     * (cmd == LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, or LC_REEXPORT_DYLIB) for each
+     * library it uses.
+     */
+    struct dylib_command
+    {
+        /// LC_ID_DYLIB, LC_LOAD_{,WEAK_}DYLIB, LC_REEXPORT_DYLIB.
+        uint cmd;
+
+        /// Includes pathname string.
+        uint cmdsize;
+
+        /// The library identification.
+        dylib dylib_;
+    }
+
+    /**
+     * A dynamically linked shared library may be a subframework of an umbrella
+     * framework. If so it will be linked with "-umbrella umbrella_name" where
+     * Where "umbrella_name" is the name of the umbrella framework. A
+     * subframework can only be linked against by its umbrella framework or
+     * other subframeworks that are part of the same umbrella framework.
+     * Otherwise the static link editor produces an error and states to link
+     * against the umbrella framework. The name of the umbrella framework for
+     * subframeworks is recorded in the following structure.
+     */
+    struct sub_framework_command
+    {
+        /// LC_SUB_FRAMEWORK.
+        uint cmd;
+
+        /// Includes umbrella string.
+        uint cmdsize;
+
+        /// The umbrella framework name.
+        lc_str umbrella;
+    }
+
+    /**
+     * For dynamically linked shared libraries that are subframework of an
+     * umbrella framework they can allow clients other than the umbrella
+     * framework or other subframeworks in the same umbrella framework. To do
+     * this the subframework is built with "-allowable_client client_name" and
+     * an LC_SUB_CLIENT load command is created for each -allowable_client flag.
+     * The client_name is usually a framework name. It can also be a name used
+     * for bundles clients where the bundle is built with
+     * "-client_name client_name".
+     */
+    struct sub_client_command
+    {
+        /// LC_SUB_CLIENT.
+        uint cmd;
+
+        /// Includes client string.
+        uint cmdsize;
+
+        /// The client name.
+        lc_str client;
+    }
+
+    /**
+     * A dynamically linked shared library may be a sub_umbrella of an umbrella
+     * framework. If so it will be linked with "-sub_umbrella umbrella_name"
+     * where "umbrella_name" is the name of the sub_umbrella framework. When
+     * statically linking when -twolevel_namespace is in effect a twolevel
+     * namespace umbrella framework will only cause its subframeworks and those
+     * frameworks listed as sub_umbrella frameworks to be implicited linked in.
+     * Any other dependent dynamic libraries will not be linked it when
+     * -twolevel_namespace is in effect. The primary library recorded by the
+     * static linker when resolving a symbol in these libraries will be the
+     * umbrella framework. Zero or more sub_umbrella frameworks may be use by an
+     * umbrella framework. The name of a sub_umbrella framework is recorded in
+     * the following structure.
+     */
+    struct sub_umbrella_command
+    {
+        /// LC_SUB_UMBRELLA.
+        uint cmd;
+
+        /// Includes sub_umbrella string.
+        uint cmdsize;
+
+        /// The sub_umbrella framework name.
+        lc_str sub_umbrella;
+    }
+
+    /**
+     * A dynamically linked shared library may be a sub_library of another
+     * shared library. If so it will be linked with "-sub_library library_name"
+     * where "library_name" is the name of the sub_library shared library. When
+     * statically linking when -twolevel_namespace is in effect a twolevel
+     * namespace shared library will only cause its subframeworks and those
+     * frameworks listed as sub_umbrella frameworks and libraries listed as
+     * sub_libraries to be implicited linked in. Any other dependent dynamic
+     * libraries will not be linked it when -twolevel_namespace is in effect.
+     * The primary library recorded by the static linker when resolving a symbol
+     * in these libraries will be the umbrella framework (or dynamic library).
+     * Zero or more sub_library shared libraries may be use by an umbrella
+     * framework or (or dynamic library). The name of a sub_library framework is
+     * recorded in the following structure. For example
+     * /usr/lib/libobjc_profile.A.dylib would be recorded as "libobjc".
+     */
+    struct sub_library_command
+    {
+        /// LC_SUB_LIBRARY.
+        uint cmd;
+
+        /// Includes sub_library string.
+        uint cmdsize;
+
+        /// The sub_library name.
+        lc_str sub_library;
+    }
+
+    /**
+     * A program (filetype == MH_EXECUTE) that is
+     * prebound to its dynamic libraries has one of these for each library that
+     * the static linker used in prebinding. It contains a bit vector for the
+     * modules in the library. The bits indicate which modules are bound (1) and
+     * which are not (0) from the library. The bit for module 0 is the low bit
+     * of the first byte. So the bit for the Nth module is:
+     * (linked_modules[N/8] >> N%8) & 1
+     */
+    struct prebound_dylib_command
+    {
+        /// LC_PREBOUND_DYLIB.
+        uint cmd;
+
+        /// Includes strings.
+        uint cmdsize;
+
+        /// Library's path name.
+        lc_str name;
+
+        /// Number of modules in library.
+        uint nmodules;
+
+        /// Bit vector of linked modules.
+        lc_str linked_modules;
+    }
+
+    /**
+     * A program that uses a dynamic linker contains a dylinker_command to
+     * identify the name of the dynamic linker (LC_LOAD_DYLINKER). And a dynamic
+     * linker contains a dylinker_command to identify the dynamic linker
+     * (LC_ID_DYLINKER). A file can have at most one of these.
+     * This struct is also used for the LC_DYLD_ENVIRONMENT load command and
+     * contains string for dyld to treat like environment variable.
+     */
+    struct dylinker_command
+    {
+        /// LC_ID_DYLINKER, LC_LOAD_DYLINKER or LC_DYLD_ENVIRONMENT.
+        uint cmd;
+
+        /// Includes pathname string.
+        uint cmdsize;
+
+        /// Dynamic linker's path name.
+        lc_str name;
+    }
+
+    /**
+     * Thread commands contain machine-specific data structures suitable for
+     * use in the thread state primitives. The machine specific data structures
+     * follow the struct thread_command as follows.
+     * Each flavor of machine specific data structure is preceded by an uint32_t
+     * constant for the flavor of that data structure, an uint32_t that is the
+     * count of uint32_t's of the size of the state data structure and then
+     * the state data structure follows. This triple may be repeated for many
+     * flavors. The constants for the flavors, counts and state data structure
+     * definitions are expected to be in the header file <machine/thread_status.h>.
+     * These machine specific data structures sizes must be multiples of
+     * 4 bytes. The cmdsize reflects the total size of the thread_command
+     * and all of the sizes of the constants for the flavors, counts and state
+     * data structures.
+     *
+     * For executable objects that are unix processes there will be one
+     * thread_command (cmd == LC_UNIXTHREAD) created for it by the link-editor.
+     * This is the same as a LC_THREAD, except that a stack is automatically
+     * created (based on the shell's limit for the stack size). Command
+     * arguments and environment variables are copied onto that stack.
+     */
+    struct thread_command
+    {
+        /// LC_THREAD or  LC_UNIXTHREAD.
+        uint cmd;
+
+        /// Total size of this command.
+        uint cmdsize;
+    }
+
+    /**
+     * The routines command contains the address of the dynamic shared library
+     * initialization routine and an index into the module table for the module
+     * that defines the routine. Before any modules are used from the library
+     * the dynamic linker fully binds the module that defines the initialization
+     * routine and then calls it. This gets called before any module
+     * initialization routines (used for C++ static constructors) in the library.
+     */
+    struct routines_command
+    {
+        /// LC_ROUTINES.
+        uint cmd;
+
+        /// Total size of this command.
+        uint cmdsize;
+
+        /// Address of initialization routine.
+        uint init_address;
+
+        /// Index into the module table that.
+        uint init_module;
+
+        // the init routine is defined in
+
+        ///
+        uint reserved1;
+
+        ///
+        uint reserved2;
+
+        ///
+        uint reserved3;
+
+        ///
+        uint reserved4;
+
+        ///
+        uint reserved5;
+
+        ///
+        uint reserved6;
+    }
+
+    /// The 64-bit routines command. Same use as above.
+    struct routines_command_64
+    {
+        /// LC_ROUTINES_64.
+        uint cmd;
+
+        /// Total size of this command.
+        uint cmdsize;
+
+        /// Address of initialization routine.
+        ulong init_address;
+
+        /// Index into the module table that.
+        ulong init_module;
+
+        /*  the init routine is defined in */
+
+        ///
+        ulong reserved1;
+
+        ///
+        ulong reserved2;
+
+        ///
+        ulong reserved3;
+
+        ///
+        ulong reserved4;
+
+        ///
+        ulong reserved5;
+
+        ///
+        ulong reserved6;
+    }
+
+    /**
+     * The symtab_command contains the offsets and sizes of the link-edit 4.3BSD
+     * "stab" style symbol table information as described in the header files
+     * <nlist.h> and <stab.h>.
+     */
+    struct symtab_command
+    {
+        /// LC_SYMTAB.
+        uint cmd;
+
+        /// Sizeof(struct symtab_command).
+        uint cmdsize;
+
+        /// Symbol table offset.
+        uint symoff;
+
+        /// Number of symbol table entries.
+        uint nsyms;
+
+        /// String table offset.
+        uint stroff;
+
+        /// String table size in bytes.
+        uint strsize;
+    }
+
+    /**
+     * This is the second set of the symbolic information which is used to
+     * support the data structures for the dynamically link editor.
+     *
+     * The original set of symbolic information in the symtab_command which contains
+     * the symbol and string tables must also be present when this load command is
+     * present. When this load command is present the symbol table is organized
+     * into three groups of symbols:
+     * * local symbols (static and debugging symbols) - grouped by module
+     * * defined external symbols - grouped by module (sorted by name if not lib)
+     * * undefined external symbols (sorted by name if MH_BINDATLOAD is not set,
+     *      and in order the were seen by the static
+     *      linker if MH_BINDATLOAD is set)
+     *
+     * In this load command there are offsets and counts to each of the three
+     * groups of symbols.
+     *
+     * This load command contains a the offsets and sizes of the following new
+     * symbolic information tables:
+     * * table of contents
+     * * module table
+     * * reference symbol table
+     * * indirect symbol table
+     *
+     * The first three tables above (the table of contents, module table and
+     * reference symbol table) are only present if the file is a dynamically
+     * linked shared library. For executable and object modules, which are files
+     * containing only one module, the information that would be in these three
+     * tables is determined as follows:
+     * * table of contents - the defined external symbols are sorted by name
+     * * module table - the file contains only one module so everything in the
+     *      file is part of the module.
+     * * reference symbol table - is the defined and undefined external symbols
+     *
+     * For dynamically linked shared library files this load command also
+     * contains offsets and sizes to the pool of relocation entries for all
+     * sections separated into two groups:
+     * * external relocation entries
+     * * local relocation entries
+     *
+     * For executable and object modules the relocation entries continue to hang
+     * off the section structures.
+     */
+    struct dysymtab_command
+    {
+        /// LC_DYSYMTAB.
+        uint cmd;
+
+        /// sizeof(struct dysymtab_command).
+        uint cmdsize;
+
+        /**
+         * Index to local symbols.
+         *
+         * The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
+         * are grouped into the following three groups:
+         * * local symbols (further grouped by the module they are from)
+         * * defined external symbols (further grouped by the module they are from)
+         * * undefined symbols
+         *
+         * The local symbols are used only for debugging. The dynamic binding
+         * process may have to use them to indicate to the debugger the local
+         * symbols for a module that is being bound.
+         *
+         * The last two groups are used by the dynamic binding process to do the
+         * binding (indirectly through the module table and the reference symbol
+         * table when this is a dynamically linked shared library file).
+         */
+        uint ilocalsym;
+
+        /// Number of local symbols.
+        uint nlocalsym;
+
+
+
+        /// Index to externally defined symbols.
+        uint iextdefsym;
+
+        /// Number of externally defined symbols.
+        uint nextdefsym;
+
+
+
+        /// Index to undefined symbols.
+        uint iundefsym;
+
+        /// Number of undefined symbols.
+        uint nundefsym;
+
+        /**
+         * File offset to table of contents.
+         *
+         * For the for the dynamic binding process to find which module a symbol
+         * is defined in the table of contents is used (analogous to the ranlib
+         * structure in an archive) which maps defined external symbols to
+         * modules they are defined in. This exists only in a dynamically linked
+         * shared library file. For executable and object modules the defined
+         * external symbols are sorted by name and is use as the table of
+         * contents.
+         */
+        uint tocoff;
+
+        /// Number of entries in table of contents.
+        uint ntoc;
+
+        /**
+         * File offset to module table.
+         *
+         * To support dynamic binding of "modules" (whole object files) the
+         * symbol table must reflect the modules that the file was created from.
+         * This is done by having a module table that has indexes and counts
+         * into the merged tables for each module. The module structure that
+         * these two entries refer to is described below. This exists only in a
+         * dynamically linked shared library file. For executable and object
+         * modules the file only contains one module so everything in the file
+         * belongs to the module.
+         */
+        uint modtaboff;
+
+        /// Number of module table entries.
+        uint nmodtab;
+
+        /**
+         * Offset to referenced symbol table.
+         *
+         * To support dynamic module binding the module structure for each
+         * module indicates the external references (defined and undefined) each
+         * module makes. For each module there is an offset and a count into the
+         * reference symbol table for the symbols that the module references.
+         * This exists only in a dynamically linked shared library file. For
+         * executable and object modules the defined external symbols and the
+         * undefined external symbols indicates the external references.
+         */
+        uint extrefsymoff;
+
+        /// Number of referenced symbol table entries.
+        uint nextrefsyms;
+
+        /**
+         * File offset to the indirect symbol table.
+         *
+         * The sections that contain "symbol pointers" and "routine stubs" have
+         * indexes and (implied counts based on the size of the section and
+         * fixed size of the entry) into the "indirect symbol" table for each
+         * pointer and stub. For every section of these two types the index into
+         * the indirect symbol table is stored in the section header in the
+         * field reserved1. An indirect symbol table entry is simply a 32bit
+         * index into the symbol table to the symbol that the pointer or stub is
+         * referring to. The indirect symbol table is ordered to match the
+         * entries in the section.
+         */
+        uint indirectsymoff;
+
+        /// Number of indirect symbol table entries.
+        uint nindirectsyms;
+
+        /**
+         * Offset to external relocation entries-
+         *
+         * To support relocating an individual module in a library file quickly
+         * the external relocation entries for each module in the library need
+         * to be accessed efficiently. Since the relocation entries can't be
+         * accessed through the section headers for a library file they are
+         * separated into groups of local and external entries further grouped
+         * by module. In this case the presents of this load command who's
+         * extreloff, nextrel, locreloff and nlocrel fields are non-zero
+         * indicates that the relocation entries of non-merged sections are not
+         * referenced through the section structures (and the reloff and nreloc
+         * fields in the section headers are set to zero).
+         *
+         * Since the relocation entries are not accessed through the section
+         * headers this requires the r_address field to be something other than
+         * a section offset to identify the item to be relocated. In this case
+         * r_address is set to the offset from the vmaddr of the first
+         * LC_SEGMENT command. For MH_SPLIT_SEGS images r_address is set to the
+         * offset from thevmaddr of the first read-write LC_SEGMENT command.
+         *
+         * The relocation entries are grouped by module and the module table
+         * entries have indexes and counts into them for the group of external
+         * relocation entries for that the module.
+         *
+         * For sections that are merged across modules there must not be any
+         * remaining external relocation entries for them (for merged sections
+         * remaining relocation entries must be local).
+         */
+        uint extreloff;
+
+        /// Number of external relocation entries.
+        uint nextrel;
+
+        /**
+         * Offset to local relocation entries.
+         *
+         * All the local relocation entries are grouped together (they are not
+         * grouped by their module since they are only used if the object is
+         * moved from it statically link edited address).
+         */
+        uint locreloff;
+
+        /// Number of local relocation entries.
+        uint nlocrel;
+    }
+
+    /**
+     * An indirect symbol table entry is simply a 32bit index into the symbol
+     * table to the symbol that the pointer or stub is referring to. Unless it
+     * is for a non-lazy symbol pointer section for a defined symbol which
+     * strip(1) as removed. In which case it has the value
+     * INDIRECT_SYMBOL_LOCAL. If the symbol was also absolute
+     * INDIRECT_SYMBOL_ABS is or'ed with that.
+     */
+    enum
+    {
+        ///
+        INDIRECT_SYMBOL_LOCAL,
+
+        ///
+        INDIRECT_SYMBOL_ABS
+    }
+
+    /// A table of contents entry.
+    struct dylib_table_of_contents
+    {
+        /// The defined external symbol (index into the symbol table).
+        uint symbol_index;
+
+        /// Index into the module table this symbol is defined in.
+        uint module_index;
+    }
+
+    /// A module table entry.
+    struct dylib_module
+    {
+        /// The module name (index into string table).
+        uint module_name;
+
+
+
+        /// Index into externally defined symbols.
+        uint iextdefsym;
+
+        /// Number of externally defined symbols.
+        uint nextdefsym;
+
+        /// Index into reference symbol table.
+        uint irefsym;
+
+        /// Number of reference symbol table entries.
+        uint nrefsym;
+
+        /// Index into symbols for local symbols.
+        uint ilocalsym;
+
+        /// Number of local symbols.
+        uint nlocalsym;
+
+
+
+        /// Index into external relocation entries.
+        uint iextrel;
+
+        /// Number of external relocation entries.
+        uint nextrel;
+
+
+
+        /**
+         * Low 16 bits are the index into the init section, high 16 bits are the
+         * index into the term section.
+         */
+        uint iinit_iterm;
+
+        /**
+         * Low 16 bits are the number of init section entries, high 16 bits are
+         * the number of term section entries.
+         */
+        uint ninit_nterm;
+
+
+
+        /**
+         * The (__OBJC,__module_info) section.
+         *
+         * For this module address of the start of.
+         */
+        uint objc_module_info_addr;
+
+        /**
+         * The (__OBJC,__module_info) section.
+         *
+         * For this module size of.
+         */
+        uint objc_module_info_size;
+    }
+
+    /// A 64-bit module table entry.
+    struct dylib_module_64
+    {
+        /// The module name (index into string table).
+        uint module_name;
+
+
+
+        /// Index into externally defined symbols.
+        uint iextdefsym;
+
+        /// Number of externally defined symbols.
+        uint nextdefsym;
+
+        /// Index into reference symbol table.
+        uint irefsym;
+
+        /// Number of reference symbol table entries.
+        uint nrefsym;
+
+        /// Index into symbols for local symbols.
+        uint ilocalsym;
+
+        /// Number of local symbols.
+        uint nlocalsym;
+
+
+
+        /// Index into external relocation entries.
+        uint iextrel;
+
+        /// Number of external relocation entries.
+        uint nextrel;
+
+
+
+        /**
+         * Low 16 bits are the index into the init section, high 16 bits are the
+         * index into the term section.
+         */
+        uint iinit_iterm;
+
+        /**
+         * Low 16 bits are the number of init section entries, high 16 bits are
+         * the number of term section entries.
+         */
+        uint ninit_nterm;
+
+
+
+        /**
+         * The (__OBJC,__module_info) section.
+         *
+         * For this module size of.
+         */
+        uint objc_module_info_size;
+
+        /**
+         * The (__OBJC,__module_info) section.
+         *
+         * For this module address of the start of.
+         */
+        ulong objc_module_info_addr;
+    }
+
+    /**
+     * The entries in the reference symbol table are used when loading the
+     * module (both by the static and dynamic link editors) and if the module is
+     * unloaded or replaced. Therefore all external symbols
+     * (defined and undefined) are listed in the module's reference table. The
+     * flags describe the type of reference that is being made. The constants
+     * for the flags are defined in <mach-o/nlist.h> as they are also used for
+     * symbol table entries.
+     */
+    struct dylib_reference
+    {
+        /// Index into the symbol table.
+        @property uint isym() const pure nothrow @nogc @safe;
+
+        /// ditto
+        @property void isym(uint v) @safe pure nothrow @nogc;
+
+        /// Flags to indicate the type of reference.
+        @property uint flags() const pure nothrow @nogc @safe;
+
+        /// ditto
+        @property void flags(uint v) pure nothrow @nogc @safe;
+    }
+
+    /**
+     * The twolevel_hints_command contains the offset and number of hints in the
+     * two-level namespace lookup hints table.
+     */
+    struct twolevel_hints_command
+    {
+        /// LC_TWOLEVEL_HINTS.
+        uint cmd;
+
+        /// Sizeof(struct twolevel_hints_command).
+        uint cmdsize;
+
+        /// Offset to the hint table.
+        uint offset;
+
+        /// Number of hints in the hint table.
+        uint nhints;
+    }
+
+    /**
+     * The entries in the two-level namespace lookup hints table are
+     * twolevel_hint structs. These provide hints to the dynamic link editor
+     * where to start looking for an undefined symbol in a two-level namespace
+     * image. The isub_image field is an index into the sub-images
+     * (sub-frameworks and sub-umbrellas list) that made up the two-level image
+     * that the undefined symbol was found in when it was built by the static
+     * link editor. If isub-image is 0 the the symbol is expected to be defined
+     * in library and not in the sub-images. If isub-image is non-zero it is an
+     * index into the array of sub-images for the umbrella with the first index
+     * in the sub-images being 1. The array of sub-images is the ordered list of
+     * sub-images of the umbrella that would be searched for a symbol that has
+     * the umbrella recorded as its primary library. The table of contents index
+     * is an index into the library's table of contents. This is used as the
+     * starting point of the binary search or a directed linear search.
+     */
+    struct twolevel_hint
+    {
+        /// Index into the sub images.
+        @property uint isub_image() const pure nothrow @nogc @safe;
+
+        /// ditto
+        @property void isub_image(uint v) pure nothrow @nogc @safe;
+
+        /// Index into the table of contents.
+        @property uint itoc() const pure nothrow @nogc @safe;
+
+        /// ditto
+        @property void itoc(uint v) pure nothrow @nogc @safe;
+    }
+
+    /**
+     * The prebind_cksum_command contains the value of the original check sum
+     * for prebound files or zero. When a prebound file is first created or
+     * modified for other than updating its prebinding information the value of
+     * the check sum is set to zero. When the file has it prebinding re-done and
+     * if the value of the check sum is zero the original check sum is
+     * calculated and stored in cksum field of this load command in the output
+     * file. If when the prebinding is re-done and the cksum field is non-zero
+     * it is left unchanged from the input file.
+     */
+    struct prebind_cksum_command
+    {
+        /// LC_PREBIND_CKSUM.
+        uint cmd;
+
+        /// Sizeof(struct prebind_cksum_command).
+        uint cmdsize;
+
+        /// The check sum or zero.
+        uint cksum;
+    }
+
+    /**
+     * The uuid load command contains a single 128-bit unique random number that
+     * identifies an object produced by the static link editor.
+     */
+    struct uuid_command
+    {
+        /// LC_UUID.
+        uint cmd;
+
+        /// Sizeof(struct uuid_command).
+        uint cmdsize;
+
+        /// The 128-bit uuid.
+        ubyte[16] uuid;
+    }
+
+    /**
+     * The rpath_command contains a path which at runtime should be added to
+     * the current run path used to find @rpath prefixed dylibs.
+     */
+    struct rpath_command
+    {
+        /// LC_RPATH.
+        uint cmd;
+
+        /// Includes string.
+        uint cmdsize;
+
+        /// Path to add to run path.
+        lc_str path;
+    }
+
+    /**
+     * The linkedit_data_command contains the offsets and sizes of a blob
+     * of data in the __LINKEDIT segment.
+     */
+    struct linkedit_data_command
+    {
+        /**
+         * LC_CODE_SIGNATURE, LC_SEGMENT_SPLIT_INFO, LC_FUNCTION_STARTS,
+         * LC_DATA_IN_CODE, LC_DYLIB_CODE_SIGN_DRS,
+         * LC_LINKER_OPTIMIZATION_HINT, LC_DYLD_EXPORTS_TRIE or
+         * LC_DYLD_CHAINED_FIXUPS.
+         */
+        uint cmd;
+
+        /// Sizeof(struct linkedit_data_command).
+        uint cmdsize;
+
+        /// File offset of data in __LINKEDIT segment.
+        uint dataoff;
+
+        /// File size of data in __LINKEDIT segment.
+        uint datasize;
+
+    }
+
+    /**
+     * The encryption_info_command contains the file offset and size of an
+     * of an encrypted segment.
+     */
+    struct encryption_info_command
+    {
+        /// LC_ENCRYPTION_INFO.
+        uint cmd;
+
+        /// Sizeof(struct encryption_info_command).
+        uint cmdsize;
+
+        /// File offset of encrypted range.
+        uint cryptoff;
+
+        /// File size of encrypted range.
+        uint cryptsize;
+
+        /// Which encryption system, 0 means not-encrypted yet.
+        uint cryptid;
+    }
+
+    /**
+     * The encryption_info_command_64 contains the file offset and size of an
+     * of an encrypted segment (for use in x86_64 targets).
+     */
+    struct encryption_info_command_64
+    {
+        /// LC_ENCRYPTION_INFO_64.
+        uint cmd;
+
+        /// Sizeof(struct encryption_info_command_64).
+        uint cmdsize;
+
+        /// File offset of encrypted range.
+        uint cryptoff;
+
+        /// File size of encrypted range.
+        uint cryptsize;
+
+        /// Which encryption system, 0 means not-encrypted yet.
+        uint cryptid;
+
+        /// Padding to make this struct's size a multiple of 8 bytes.
+        uint pad;
+    }
+
+    /**
+     * The version_min_command contains the min OS version on which this
+     * binary was built to run.
+     */
+    struct version_min_command
+    {
+        /**
+         * LC_VERSION_MIN_MACOSX or LC_VERSION_MIN_IPHONEOS or
+         * LC_VERSION_MIN_WATCHOS or LC_VERSION_MIN_TVOS.
+         */
+        uint cmd;
+
+        /// Sizeof(struct min_version_command).
+        uint cmdsize;
+
+        /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+        uint version_;
+
+        /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+        uint sdk;
+    }
+
+    /**
+     * The build_version_command contains the min OS version on which this
+     * binary was built to run for its platform. The list of known platforms and
+     * tool values following it.
+     */
+    struct build_version_command
+    {
+        /// LC_BUILD_VERSION.
+        uint cmd;
+
+        /**
+         * Sizeof(struct build_version_command) plus ntools
+         * sizeof(struct build_tool_version).
+         */
+        uint cmdsize;
+
+        /// Platform.
+        uint platform;
+
+        /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+        uint minos;
+
+        /// X.Y.Z is encoded in nibbles xxxx.yy.zz.
+        uint sdk;
+
+        /// Number of tool entries following this.
+        uint ntools;
+
+    }
+
+    ///
+    struct build_tool_version
+    {
+        /// Enum for the tool.
+        uint tool;
+
+        /// Version number of the tool.
+        uint version_;
+    }
+
+    /// Known values for the platform field above.
+    enum
+    {
+        ///
+        PLATFORM_MACOS,
+
+        ///
+        PLATFORM_IOS,
+
+        ///
+        PLATFORM_TVOS,
+
+        ///
+        PLATFORM_WATCHOS,
+
+        ///
+        PLATFORM_BRIDGEOS,
+
+        ///
+        PLATFORM_UIKITFORMAC,
+
+        ///
+        PLATFORM_IOSSIMULATOR,
+
+        ///
+        PLATFORM_TVOSSIMULATOR,
+
+        ///
+        PLATFORM_WATCHOSSIMULATOR,
+
+        ///
+        PLATFORM_DRIVERKIT
+    }
+
+
+    /// Known values for the tool field above.
+    enum
+    {
+        ///
+        TOOL_CLANG,
+
+        ///
+        TOOL_SWIFT,
+
+        ///
+        TOOL_LD
+    }
+
+    /**
+     * The dyld_info_command contains the file offsets and sizes of
+     * the new compressed form of the information dyld needs to
+     * load the image. This information is used by dyld on Mac OS X
+     * 10.6 and later. All information pointed to by this command
+     * is encoded using byte streams, so no endian swapping is needed
+     * to interpret it.
+     */
+    struct dyld_info_command
+    {
+        /// LC_DYLD_INFO or LC_DYLD_INFO_ONLY.
+        uint cmd;
+
+        /// Sizeof(struct dyld_info_command).
+        uint cmdsize;
+
+
+
+        /**
+         * File offset to rebase info.
+         *
+         * Dyld rebases an image whenever dyld loads it at an address different
+         * from its preferred address. The rebase information is a stream
+         * of byte sized opcodes whose symbolic names start with REBASE_OPCODE_.
+         * Conceptually the rebase information is a table of tuples:
+         *    <seg-index, seg-offset, type>
+         * The opcodes are a compressed way to encode the table by only
+         * encoding when a column changes. In addition simple patterns
+         * like "every n'th offset for m times" can be encoded in a few
+         * bytes.
+         */
+        uint rebase_off;
+
+        /// Size of rebase info.
+        uint rebase_size;
+
+
+
+        /**
+         * File offset to binding info.
+         *
+         * Dyld binds an image during the loading process, if the image
+         * requires any pointers to be initialized to symbols in other images.
+         * The bind information is a stream of byte sized
+         * opcodes whose symbolic names start with BIND_OPCODE_.
+         * Conceptually the bind information is a table of tuples:
+         *    <seg-index, seg-offset, type, symbol-library-ordinal, symbol-name, addend>
+         * The opcodes are a compressed way to encode the table by only
+         * encoding when a column changes. In addition simple patterns
+         * like for runs of pointers initialzed to the same value can be
+         * encoded in a few bytes.
+         */
+        uint bind_off;
+
+        /// Size of binding info.
+        uint bind_size;
+
+
+
+        /**
+         * File offset to weak binding info.
+         *
+         * Some C++ programs require dyld to unique symbols so that all
+         * images in the process use the same copy of some code/data.
+         * This step is done after binding. The content of the weak_bind
+         * info is an opcode stream like the bind_info. But it is sorted
+         * alphabetically by symbol name. This enable dyld to walk
+         * all images with weak binding information in order and look
+         * for collisions. If there are no collisions, dyld does
+         * no updating. That means that some fixups are also encoded
+         * in the bind_info. For instance, all calls to "operator new"
+         * are first bound to libstdc++.dylib using the information
+         * in bind_info. Then if some image overrides operator new
+         * that is detected when the weak_bind information is processed
+         * and the call to operator new is then rebound.
+         */
+        uint weak_bind_off;
+
+        /// Size of weak binding info.
+        uint weak_bind_size;
+
+
+
+        /**
+         * File offset to lazy binding info.
+         *
+         * Some uses of external symbols do not need to be bound immediately.
+         * Instead they can be lazily bound on first use. The lazy_bind
+         * are contains a stream of BIND opcodes to bind all lazy symbols.
+         * Normal use is that dyld ignores the lazy_bind section when
+         * loading an image. Instead the static linker arranged for the
+         * lazy pointer to initially point to a helper function which
+         * pushes the offset into the lazy_bind area for the symbol
+         * needing to be bound, then jumps to dyld which simply adds
+         * the offset to lazy_bind_off to get the information on what
+         * to bind.
+         */
+        uint lazy_bind_off;
+
+        /// Size of lazy binding infs.
+        uint lazy_bind_size;
+
+
+
+        /**
+         * File offset to lazy binding info.
+         *
+         * The symbols exported by a dylib are encoded in a trie. This
+         * is a compact representation that factors out common prefixes.
+         * It also reduces LINKEDIT pages in RAM because it encodes all
+         * information (name, address, flags) in one small, contiguous range.
+         * The export area is a stream of nodes. The first node sequentially
+         * is the start node for the trie.
+         *
+         * Nodes for a symbol start with a uleb128 that is the length of
+         * the exported symbol information for the string so far.
+         * If there is no exported symbol, the node starts with a zero byte.
+         * If there is exported info, it follows the length.
+         *
+         * First is a uleb128 containing flags. Normally, it is followed by
+         * a uleb128 encoded offset which is location of the content named
+         * by the symbol from the mach_header for the image. If the flags
+         * is EXPORT_SYMBOL_FLAGS_REEXPORT, then following the flags is
+         * a uleb128 encoded library ordinal, then a zero terminated
+         * UTF8 string. If the string is zero length, then the symbol
+         * is re-export from the specified dylib with the same name.
+         * If the flags is EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER, then following
+         * the flags is two uleb128s: the stub offset and the resolver offset.
+         * The stub is used by non-lazy pointers. The resolver is used
+         * by lazy pointers and must be called to get the actual address to use.
+         *
+         * After the optional exported symbol information is a byte of
+         * how many edges (0-255) that this node has leaving it,
+         * followed by each edge.
+         * Each edge is a zero terminated UTF8 of the addition chars
+         * in the symbol, followed by a uleb128 offset for the node that
+         * edge points to.
+         *
+         */
+        uint export_off;
+
+        /// Size of lazy binding infs.
+        uint export_size;
+    }
+
+    /// The following are used to encode rebasing information.
+    enum
+    {
+        ///
+        REBASE_TYPE_POINTER,
+
+        ///
+        REBASE_TYPE_TEXT_ABSOLUTE32,
+
+        ///
+        REBASE_TYPE_TEXT_PCREL32,
+
+
+
+        ///
+        REBASE_OPCODE_MASK,
+
+        ///
+        REBASE_IMMEDIATE_MASK,
+
+        ///
+        REBASE_OPCODE_DONE,
+
+        ///
+        REBASE_OPCODE_SET_TYPE_IMM,
+
+        ///
+        REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB,
+
+        ///
+        REBASE_OPCODE_ADD_ADDR_ULEB,
+
+        ///
+        REBASE_OPCODE_ADD_ADDR_IMM_SCALED,
+
+        ///
+        REBASE_OPCODE_DO_REBASE_IMM_TIMES,
+
+        ///
+        REBASE_OPCODE_DO_REBASE_ULEB_TIMES,
+
+        ///
+        REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB,
+
+        ///
+        REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB
+    }
+
+
+    /// The following are used to encode binding information.
+    enum
+    {
+        ///
+        BIND_TYPE_POINTER,
+
+        ///
+        BIND_TYPE_TEXT_ABSOLUTE32,
+
+        ///
+        BIND_TYPE_TEXT_PCREL32,
+
+
+
+        ///
+        BIND_SPECIAL_DYLIB_SELF,
+
+        ///
+        BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE,
+
+        ///
+        BIND_SPECIAL_DYLIB_FLAT_LOOKUP,
+
+        ///
+        BIND_SPECIAL_DYLIB_WEAK_LOOKUP,
+
+
+
+        ///
+        BIND_SYMBOL_FLAGS_WEAK_IMPORT,
+
+        ///
+        BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION,
+
+
+
+        ///
+        BIND_OPCODE_MASK,
+
+        ///
+        BIND_IMMEDIATE_MASK,
+
+        ///
+        BIND_OPCODE_DONE,
+
+        ///
+        BIND_OPCODE_SET_DYLIB_ORDINAL_IMM,
+
+        ///
+        BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB,
+
+        ///
+        BIND_OPCODE_SET_DYLIB_SPECIAL_IMM,
+
+        ///
+        BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM,
+
+        ///
+        BIND_OPCODE_SET_TYPE_IMM,
+
+        ///
+        BIND_OPCODE_SET_ADDEND_SLEB,
+
+        ///
+        BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB,
+
+        ///
+        BIND_OPCODE_ADD_ADDR_ULEB,
+
+        ///
+        BIND_OPCODE_DO_BIND,
+
+        ///
+        BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB,
+
+        ///
+        BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED,
+
+        ///
+        BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB,
+
+        ///
+        BIND_OPCODE_THREADED,
+
+        ///
+        BIND_SUBOPCODE_THREADED_SET_BIND_ORDINAL_TABLE_SIZE_ULEB,
+
+        ///
+        BIND_SUBOPCODE_THREADED_APPLY
+    }
+
+    /**
+     * The following are used on the flags byte of a terminal node
+     * in the export information.
+     */
+    enum
+    {
+
+        ///
+        EXPORT_SYMBOL_FLAGS_KIND_MASK,
+
+        ///
+        EXPORT_SYMBOL_FLAGS_KIND_REGULAR,
+
+        ///
+        EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL,
+
+        ///
+        EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE,
+
+        ///
+        EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION,
+
+        ///
+        EXPORT_SYMBOL_FLAGS_REEXPORT,
+
+        ///
+        EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER,
+
+    }
+
+
+    /*
+     * The linker_option_command contains linker options embedded in object files.
+     */
+    struct linker_option_command
+    {
+        /// LC_LINKER_OPTION only used in MH_OBJECT filetypes.
+        uint cmd;
+
+        ///
+        uint cmdsize;
+
+        /**
+         * Number of strings concatenation of zero terminated UTF8 strings.
+         * Zero filled at end to align.
+         */
+        uint count;
+    }
+
+    /**
+     * The symseg_command contains the offset and size of the GNU style
+     * symbol table information as described in the header file <symseg.h>.
+     * The symbol roots of the symbol segments must also be aligned properly
+     * in the file. So the requirement of keeping the offsets aligned to a
+     * multiple of a 4 bytes translates to the length field of the symbol
+     * roots also being a multiple of a long. Also the padding must again be
+     * zeroed. (THIS IS OBSOLETE and no longer supported).
+     */
+    struct symseg_command
+    {
+        /// LC_SYMSEG.
+        uint cmd;
+
+        /// Sizeof(struct symseg_command).
+        uint cmdsize;
+
+        /// Symbol segment offset.
+        uint offset;
+
+        /// Symbol segment size in bytes.
+        uint size;
+    }
+
+    /**
+     * The ident_command contains a free format string table following the
+     * ident_command structure. The strings are null terminated and the size of
+     * the command is padded out with zero bytes to a multiple of 4 bytes/
+     * (THIS IS OBSOLETE and no longer supported).
+     */
+    struct ident_command
+    {
+        /// LC_IDENT.
+        uint cmd;
+
+        /// Strings that follow this command.
+        uint cmdsize;
+    }
+
+    /**
+     * The fvmfile_command contains a reference to a file to be loaded at the
+     * specified virtual address. (Presently, this command is reserved for
+     * internal use. The kernel ignores this command when loading a program into
+     * memory).
+     */
+    struct fvmfile_command
+    {
+        /// LC_FVMFILE.
+        uint cmd;
+
+        /// Includes pathname string.
+        uint cmdsize;
+
+        /// Files pathname.
+        lc_str name;
+
+        /// Files virtual address.
+        uint header_addr;
+    }
+
+    /**
+     * The entry_point_command is a replacement for thread_command.
+     * It is used for main executables to specify the location (file offset)
+     * of main(). If -stack_size was used at link time, the stacksize
+     * field will contain the stack size need for the main thread.
+     */
+    struct entry_point_command
+    {
+        /// LC_MAIN only used in MH_EXECUTE filetypes.
+        uint cmd;
+
+        /// 24.
+        uint cmdsize;
+
+        /// File (__TEXT) offset of main().
+        ulong entryoff;
+
+        /// If not zero, initial stack size.
+        ulong stacksize;
+    }
+
+    /**
+     * The source_version_command is an optional load command containing
+     * the version of the sources used to build the binary.
+     */
+    struct source_version_command
+    {
+        /// LC_SOURCE_VERSION.
+        uint cmd;
+
+        /// 16.
+        uint cmdsize;
+
+        /// A.B.C.D.E packed as a24.b10.c10.d10.e10.
+        ulong version_;
+    }
+
+    /**
+     * The LC_DATA_IN_CODE load commands uses a linkedit_data_command
+     * to point to an array of data_in_code_entry entries. Each entry
+     * describes a range of data in a code section.
+     */
+    struct data_in_code_entry
+    {
+        /// From mach_header to start of data range.
+        uint offset;
+
+        /// Number of bytes in data range.
+        ushort length;
+
+        /// A DICE_KIND_* value.
+        ushort kind;
+    }
+
+    ///
+    enum
+    {
+        ///
+        DICE_KIND_DATA,
+
+        ///
+        DICE_KIND_JUMP_TABLE8,
+
+        ///
+        DICE_KIND_JUMP_TABLE16,
+
+        ///
+        DICE_KIND_JUMP_TABLE32,
+
+        ///
+        DICE_KIND_ABS_JUMP_TABLE32
+    }
+
+    /**
+     * Sections of type S_THREAD_LOCAL_VARIABLES contain an array
+     * of tlv_descriptor structures.
+     */
+    struct tlv_descriptor
+    {
+        ///
+        void* function (tlv_descriptor*) thunk;
+
+        ///
+        c_ulong key;
+
+        ///
+        c_ulong offset;
+    }
+
+    /**
+     * LC_NOTE commands describe a region of arbitrary data included in a Mach-O
+     * file. Its initial use is to record extra data in MH_CORE files.
+     */
+    struct note_command
+    {
+        /// LC_NOTE.
+        uint cmd;
+
+        /// Sizeof(struct note_command).
+        uint cmdsize;
+
+        /// Owner name for this LC_NOTE.
+        char[16] data_owner;
+
+        /// File offset of this data.
+        ulong offset;
+
+        /// Length of data region.
+        ulong size;
+    }
+}
+
+else version (OSX)
+    version = Darwin;
+else version (iOS)
+    version = Darwin;
+else version (TVOS)
+    version = Darwin;
+else version (WatchOS)
+    version = Darwin;
+
+version (Darwin):
+extern (C):
+
+struct mach_header
+{
+    uint magic;
+    int cputype;
+    int cpusubtype;
+    uint filetype;
+    uint ncmds;
+    uint sizeofcmds;
+    uint flags;
+}
+
+enum
+{
+    MH_MAGIC = 0xfeedface,
+    MH_CIGAM = 0xcefaedfe
+}
+
+struct mach_header_64
+{
+    uint magic;
+    int cputype;
+    int cpusubtype;
+    uint filetype;
+    uint ncmds;
+    uint sizeofcmds;
+    uint flags;
+    uint reserved;
+}
+
+enum
+{
+    MH_MAGIC_64 = 0xfeedfacf,
+    MH_CIGAM_64 = 0xcffaedfe
+}
+
+enum
+{
+    MH_OBJECT = 0x1,
+    MH_EXECUTE = 0x2,
+    MH_FVMLIB = 0x3,
+    MH_CORE = 0x4,
+    MH_PRELOAD = 0x5,
+    MH_DYLIB = 0x6,
+    MH_DYLINKER = 0x7,
+    MH_BUNDLE = 0x8,
+    MH_DYLIB_STUB = 0x9,
+    MH_DSYM = 0xa,
+    MH_KEXT_BUNDLE = 0xb
+}
+
+enum
+{
+    MH_NOUNDEFS = 0x1,
+    MH_INCRLINK = 0x2,
+    MH_DYLDLINK = 0x4,
+    MH_BINDATLOAD = 0x8,
+    MH_PREBOUND = 0x10,
+    MH_SPLIT_SEGS = 0x20,
+    MH_LAZY_INIT = 0x40,
+    MH_TWOLEVEL = 0x80,
+    MH_FORCE_FLAT = 0x100,
+    MH_NOMULTIDEFS = 0x200,
+    MH_NOFIXPREBINDING = 0x400,
+    MH_PREBINDABLE = 0x800,
+    MH_ALLMODSBOUND = 0x1000,
+    MH_SUBSECTIONS_VIA_SYMBOLS = 0x2000,
+    MH_CANONICAL = 0x4000,
+    MH_WEAK_DEFINES = 0x8000,
+    MH_BINDS_TO_WEAK = 0x10000,
+
+    MH_ALLOW_STACK_EXECUTION = 0x20000,
+    MH_ROOT_SAFE = 0x40000,
+
+    MH_SETUID_SAFE = 0x80000,
+    MH_NO_REEXPORTED_DYLIBS = 0x100000,
+    MH_PIE = 0x200000,
+    MH_DEAD_STRIPPABLE_DYLIB = 0x400000,
+    MH_HAS_TLV_DESCRIPTORS = 0x800000,
+
+    MH_NO_HEAP_EXECUTION = 0x1000000,
+
+    MH_APP_EXTENSION_SAFE = 0x02000000,
+
+    MH_NLIST_OUTOFSYNC_WITH_DYLDINFO = 0x04000000,
+
+    MH_SIM_SUPPORT = 0x08000000,
+
+    MH_DYLIB_IN_CACHE = 0x80000000
+}
+
+struct load_command
+{
+    uint cmd;
+    uint cmdsize;
+}
+
+enum LC_REQ_DYLD = 0x80000000;
+
+enum
+{
+    LC_SEGMENT = 0x1,
+    LC_SYMTAB = 0x2,
+    LC_SYMSEG = 0x3,
+    LC_THREAD = 0x4,
+    LC_UNIXTHREAD = 0x5,
+    LC_LOADFVMLIB = 0x6,
+    LC_IDFVMLIB = 0x7,
+    LC_IDENT = 0x8,
+    LC_FVMFILE = 0x9,
+    LC_PREPAGE = 0xa,
+    LC_DYSYMTAB = 0xb,
+    LC_LOAD_DYLIB = 0xc,
+    LC_ID_DYLIB = 0xd,
+    LC_LOAD_DYLINKER = 0xe,
+    LC_ID_DYLINKER = 0xf,
+    LC_PREBOUND_DYLIB = 0x10,
+    LC_ROUTINES = 0x11,
+    LC_SUB_FRAMEWORK = 0x12,
+    LC_SUB_UMBRELLA = 0x13,
+    LC_SUB_CLIENT = 0x14,
+    LC_SUB_LIBRARY = 0x15,
+    LC_TWOLEVEL_HINTS = 0x16,
+    LC_PREBIND_CKSUM = 0x17
+}
+
+enum LC_LOAD_WEAK_DYLIB = 0x18 | LC_REQ_DYLD;
+
+enum
+{
+    LC_SEGMENT_64 = 0x19,
+    LC_ROUTINES_64 = 0x1a,
+    LC_UUID = 0x1b,
+    LC_RPATH = 0x1c | LC_REQ_DYLD,
+    LC_CODE_SIGNATURE = 0x1d,
+    LC_SEGMENT_SPLIT_INFO = 0x1e,
+    LC_REEXPORT_DYLIB = 0x1f | LC_REQ_DYLD,
+    LC_LAZY_LOAD_DYLIB = 0x20,
+    LC_ENCRYPTION_INFO = 0x21,
+    LC_DYLD_INFO = 0x22,
+    LC_DYLD_INFO_ONLY = 0x22 | LC_REQ_DYLD,
+    LC_LOAD_UPWARD_DYLIB = 0x23 | LC_REQ_DYLD,
+    LC_VERSION_MIN_MACOSX = 0x24,
+    LC_VERSION_MIN_IPHONEOS = 0x25,
+    LC_FUNCTION_STARTS = 0x26,
+    LC_DYLD_ENVIRONMENT = 0x27,
+    LC_MAIN = 0x28 | LC_REQ_DYLD,
+    LC_DATA_IN_CODE = 0x29,
+    LC_SOURCE_VERSION = 0x2A,
+    LC_DYLIB_CODE_SIGN_DRS = 0x2B,
+    LC_ENCRYPTION_INFO_64 = 0x2C,
+    LC_LINKER_OPTION = 0x2D,
+    LC_LINKER_OPTIMIZATION_HINT = 0x2E,
+    LC_VERSION_MIN_TVOS = 0x2F,
+    LC_VERSION_MIN_WATCHOS = 0x30,
+    LC_NOTE = 0x31,
+    LC_BUILD_VERSION = 0x32,
+    LC_DYLD_EXPORTS_TRIE = 0x33 | LC_REQ_DYLD,
+    LC_DYLD_CHAINED_FIXUPS = 0x34 | LC_REQ_DYLD
+}
+
+union lc_str
+{
+    uint offset;
+
+    version (D_LP64) {}
+    else
+        char* ptr;
+}
+
+struct segment_command
+{
+    uint cmd;
+    uint cmdsize;
+    char[16] segname = 0;
+    uint vmaddr;
+    uint vmsize;
+    uint fileoff;
+    uint filesize;
+    int maxprot;
+    int initprot;
+    uint nsects;
+    uint flags;
+}
+
+struct segment_command_64
+{
+    uint cmd;
+    uint cmdsize;
+    char[16] segname = 0;
+    ulong vmaddr;
+    ulong vmsize;
+    ulong fileoff;
+    ulong filesize;
+    int maxprot;
+    int initprot;
+    uint nsects;
+    uint flags;
+}
+
+enum
+{
+    SG_HIGHVM = 0x1,
+    SG_FVMLIB = 0x2,
+    SG_NORELOC = 0x4,
+    SG_PROTECTED_VERSION_1 = 0x8,
+    SG_READ_ONLY = 0x10
+}
+
+struct section
+{
+    char[16] sectname = 0;
+    char[16] segname = 0;
+    uint addr;
+    uint size;
+    uint offset;
+    uint align_;
+    uint reloff;
+    uint nreloc;
+    uint flags;
+    uint reserved1;
+    uint reserved2;
+}
+
+struct section_64
+{
+    char[16] sectname = 0;
+    char[16] segname = 0;
+    ulong addr;
+    ulong size;
+    uint offset;
+    uint align_;
+    uint reloff;
+    uint nreloc;
+    uint flags;
+    uint reserved1;
+    uint reserved2;
+    uint reserved3;
+}
+
+
+enum
+{
+    SECTION_TYPE = 0x000000ff,
+    SECTION_ATTRIBUTES = 0xffffff00
+}
+
+enum
+{
+    S_REGULAR = 0x0,
+    S_ZEROFILL = 0x1,
+    S_CSTRING_LITERALS = 0x2,
+    S_4BYTE_LITERALS = 0x3,
+    S_8BYTE_LITERALS = 0x4,
+    S_LITERAL_POINTERS = 0x5,
+    S_NON_LAZY_SYMBOL_POINTERS = 0x6,
+    S_LAZY_SYMBOL_POINTERS = 0x7,
+    S_SYMBOL_STUBS = 0x8,
+    S_MOD_INIT_FUNC_POINTERS = 0x9,
+    S_MOD_TERM_FUNC_POINTERS = 0xa,
+    S_COALESCED = 0xb,
+    S_GB_ZEROFILL = 0xc,
+    S_INTERPOSING = 0xd,
+    S_16BYTE_LITERALS = 0xe,
+    S_DTRACE_DOF = 0xf,
+    S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10,
+
+    S_THREAD_LOCAL_REGULAR = 0x11,
+    S_THREAD_LOCAL_ZEROFILL = 0x12,
+    S_THREAD_LOCAL_VARIABLES = 0x13,
+    S_THREAD_LOCAL_VARIABLE_POINTERS = 0x14,
+    S_THREAD_LOCAL_INIT_FUNCTION_POINTERS = 0x15,
+    S_INIT_FUNC_OFFSETS = 0x16
+}
+
+enum
+{
+    SECTION_ATTRIBUTES_USR = 0xff000000,
+    S_ATTR_PURE_INSTRUCTIONS = 0x80000000,
+    S_ATTR_NO_TOC = 0x40000000,
+    S_ATTR_STRIP_STATIC_SYMS = 0x20000000,
+    S_ATTR_NO_DEAD_STRIP = 0x10000000,
+    S_ATTR_LIVE_SUPPORT = 0x08000000,
+    S_ATTR_SELF_MODIFYING_CODE = 0x04000000,
+    S_ATTR_DEBUG = 0x02000000,
+    SECTION_ATTRIBUTES_SYS = 0x00ffff00,
+    S_ATTR_SOME_INSTRUCTIONS = 0x00000400,
+    S_ATTR_EXT_RELOC = 0x00000200,
+    S_ATTR_LOC_RELOC = 0x00000100
+}
+
+enum
+{
+    SEG_PAGEZERO = "__PAGEZERO",
+
+    SEG_TEXT = "__TEXT",
+    SECT_TEXT = "__text",
+    SECT_FVMLIB_INIT0 = "__fvmlib_init0",
+    SECT_FVMLIB_INIT1 = "__fvmlib_init1",
+
+    SEG_DATA = "__DATA",
+    SECT_DATA = "__data",
+    SECT_BSS = "__bss",
+    SECT_COMMON = "__common",
+
+    SEG_OBJC = "__OBJC",
+    SECT_OBJC_SYMBOLS = "__symbol_table",
+    SECT_OBJC_MODULES = "__module_info",
+    SECT_OBJC_STRINGS = "__selector_strs",
+    SECT_OBJC_REFS = "__selector_refs",
+
+    SEG_ICON = "__ICON",
+    SECT_ICON_HEADER = "__header",
+    SECT_ICON_TIFF = "__tiff",
+
+    SEG_LINKEDIT = "__LINKEDIT",
+
+    SEG_UNIXSTACK = "__UNIXSTACK",
+
+    SEG_IMPORT = "__IMPORT"
+}
+
+struct fvmlib
+{
+    lc_str name;
+    uint minor_version;
+    uint header_addr;
+}
+
+struct fvmlib_command
+{
+    uint cmd;
+    uint cmdsize;
+    fvmlib fvmlib_;
+}
+
+struct dylib
+{
+    lc_str name;
+    uint timestamp;
+    uint current_version;
+    uint compatibility_version;
+}
+
+struct dylib_command
+{
+    uint cmd;
+    uint cmdsize;
+    dylib dylib_;
+}
+
+struct sub_framework_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str umbrella;
+}
+
+struct sub_client_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str client;
+}
+
+struct sub_umbrella_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str sub_umbrella;
+}
+
+struct sub_library_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str sub_library;
+}
+
+struct prebound_dylib_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str name;
+    uint nmodules;
+    lc_str linked_modules;
+}
+
+struct dylinker_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str name;
+}
+
+struct thread_command
+{
+    uint cmd;
+    uint cmdsize;
+}
+
+struct routines_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint init_address;
+    uint init_module;
+    uint reserved1;
+    uint reserved2;
+    uint reserved3;
+    uint reserved4;
+    uint reserved5;
+    uint reserved6;
+}
+
+struct routines_command_64
+{
+    uint cmd;
+    uint cmdsize;
+    ulong init_address;
+    ulong init_module;
+    ulong reserved1;
+    ulong reserved2;
+    ulong reserved3;
+    ulong reserved4;
+    ulong reserved5;
+    ulong reserved6;
+}
+
+struct symtab_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint symoff;
+    uint nsyms;
+    uint stroff;
+    uint strsize;
+}
+
+struct dysymtab_command
+{
+    uint cmd;
+    uint cmdsize;
+
+    uint ilocalsym;
+    uint nlocalsym;
+
+    uint iextdefsym;
+    uint nextdefsym;
+
+    uint iundefsym;
+    uint nundefsym;
+
+    uint tocoff;
+    uint ntoc;
+
+    uint modtaboff;
+    uint nmodtab;
+
+    uint extrefsymoff;
+    uint nextrefsyms;
+
+    uint indirectsymoff;
+    uint nindirectsyms;
+
+    uint extreloff;
+    uint nextrel;
+
+    uint locreloff;
+    uint nlocrel;
+}
+
+enum
+{
+    INDIRECT_SYMBOL_LOCAL = 0x80000000,
+    INDIRECT_SYMBOL_ABS = 0x40000000
+}
+
+struct dylib_table_of_contents
+{
+    uint symbol_index;
+    uint module_index;
+}
+
+struct dylib_module
+{
+    uint module_name;
+
+    uint iextdefsym;
+    uint nextdefsym;
+    uint irefsym;
+    uint nrefsym;
+    uint ilocalsym;
+    uint nlocalsym;
+
+    uint iextrel;
+    uint nextrel;
+
+    uint iinit_iterm;
+    uint ninit_nterm;
+
+    uint objc_module_info_addr;
+    uint objc_module_info_size;
+}
+
+struct dylib_module_64
+{
+    uint module_name;
+
+    uint iextdefsym;
+    uint nextdefsym;
+    uint irefsym;
+    uint nrefsym;
+    uint ilocalsym;
+    uint nlocalsym;
+
+    uint iextrel;
+    uint nextrel;
+
+    uint iinit_iterm;
+    uint ninit_nterm;
+
+    uint objc_module_info_size;
+    ulong objc_module_info_addr;
+}
+
+struct dylib_reference
+{
+    private uint storage;
+
+    @property uint isym()() const pure nothrow @nogc @safe
+    {
+        return cast(uint) ((storage & 16777215U) >> 0U);
+    }
+
+    @property void isym()(uint v) @safe pure nothrow @nogc
+    in
+    {
+        assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'isym'");
+        assert(v <= 16777215U, "Value is greater than the maximum value of bitfield 'isym'");
+    }
+    body
+    {
+        storage = cast(uint) ((storage & (-1 - cast(uint) 16777215U)) |
+            ((cast(uint) v << 0U) & 16777215U));
+    }
+
+    @property uint flags()() const pure nothrow @nogc @safe
+    {
+        return cast(uint) ((storage & 4278190080U) >> 24U);
+    }
+
+    @property void flags()(uint v) pure nothrow @nogc @safe
+    in
+    {
+        assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'flags'");
+        assert(v <= 255U, "Value is greater than the maximum value of bitfield 'flags'");
+    }
+    body
+    {
+        storage = cast(uint) ((storage & (-1 - cast(uint) 4278190080U)) |
+            ((cast(uint) v << 24U) & 4278190080U));
+    }
+}
+
+struct twolevel_hints_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint offset;
+    uint nhints;
+}
+
+struct twolevel_hint
+{
+    private uint storage;
+
+    @property uint isub_image()() const pure nothrow @nogc @safe
+    {
+        return cast(uint) ((storage & 255U) >>0U);
+    }
+
+    @property void isub_image()(uint v) pure nothrow @nogc @safe
+    in
+    {
+        assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'isub_image'");
+        assert(v <= 255U, "Value is greater than the maximum value of bitfield 'isub_image'");
+    }
+    body
+    {
+        storage = cast(uint) ((storage & (-1-cast(uint)255U)) |
+            ((cast(uint) v << 0U) & 255U));
+    }
+
+    @property uint itoc()() const pure nothrow @nogc @safe
+    {
+        return cast(uint) ((storage & 4294967040U) >>8U);
+    }
+
+    @property void itoc()(uint v) pure nothrow @nogc @safe
+    in
+    {
+        assert(v >= 0U, "Value is smaller than the minimum value of bitfield 'itoc'");
+        assert(v <= 16777215U, "Value is greater than the maximum value of bitfield 'itoc'");
+    }
+    body
+    {
+        storage = cast(uint) ((storage & (-1-cast(uint)4294967040U)) |
+            ((cast(uint) v << 8U) & 4294967040U));
+    }
+}
+
+struct prebind_cksum_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint cksum;
+}
+
+struct uuid_command
+{
+    uint cmd;
+    uint cmdsize;
+    ubyte[16] uuid;
+}
+
+struct rpath_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str path;
+}
+
+struct linkedit_data_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint dataoff;
+    uint datasize;
+}
+
+struct encryption_info_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint cryptoff;
+    uint cryptsize;
+    uint cryptid;
+}
+
+struct encryption_info_command_64
+{
+    uint cmd;
+    uint cmdsize;
+    uint cryptoff;
+    uint cryptsize;
+    uint cryptid;
+    uint pad;
+}
+
+struct version_min_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint version_;
+    uint sdk;
+}
+
+struct build_version_command
+{
+    uint cmd;
+    uint cmdsize;
+
+    uint platform;
+    uint minos;
+    uint sdk;
+    uint ntools;
+}
+
+struct build_tool_version
+{
+    uint tool;
+    uint version_;
+}
+
+enum
+{
+    PLATFORM_MACOS = 1,
+    PLATFORM_IOS = 2,
+    PLATFORM_TVOS = 3,
+    PLATFORM_WATCHOS = 4,
+    PLATFORM_BRIDGEOS = 5,
+    PLATFORM_UIKITFORMAC = 6,
+    PLATFORM_IOSSIMULATOR = 7,
+    PLATFORM_TVOSSIMULATOR = 8,
+    PLATFORM_WATCHOSSIMULATOR = 9,
+    PLATFORM_DRIVERKIT = 10
+}
+
+enum
+{
+    TOOL_CLANG = 1,
+    TOOL_SWIFT = 2,
+    TOOL_LD = 3
+}
+
+struct dyld_info_command
+{
+    uint cmd;
+    uint cmdsize;
+
+    uint rebase_off;
+    uint rebase_size;
+
+    uint bind_off;
+    uint bind_size;
+
+    uint weak_bind_off;
+    uint weak_bind_size;
+
+    uint lazy_bind_off;
+    uint lazy_bind_size;
+
+    uint export_off;
+    uint export_size;
+}
+
+enum
+{
+    REBASE_TYPE_POINTER = 1,
+    REBASE_TYPE_TEXT_ABSOLUTE32 = 2,
+    REBASE_TYPE_TEXT_PCREL32 = 3,
+
+    REBASE_OPCODE_MASK = 0xF0,
+    REBASE_IMMEDIATE_MASK = 0x0F,
+    REBASE_OPCODE_DONE = 0x00,
+    REBASE_OPCODE_SET_TYPE_IMM = 0x10,
+    REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB = 0x20,
+    REBASE_OPCODE_ADD_ADDR_ULEB = 0x30,
+    REBASE_OPCODE_ADD_ADDR_IMM_SCALED = 0x40,
+    REBASE_OPCODE_DO_REBASE_IMM_TIMES = 0x50,
+    REBASE_OPCODE_DO_REBASE_ULEB_TIMES = 0x60,
+    REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB = 0x70,
+    REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB = 0x80
+}
+
+enum
+{
+    BIND_TYPE_POINTER = 1,
+    BIND_TYPE_TEXT_ABSOLUTE32 = 2,
+    BIND_TYPE_TEXT_PCREL32 = 3,
+
+    BIND_SPECIAL_DYLIB_SELF = 0,
+    BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE = -1,
+    BIND_SPECIAL_DYLIB_FLAT_LOOKUP = -2,
+    BIND_SPECIAL_DYLIB_WEAK_LOOKUP = -3,
+
+    BIND_SYMBOL_FLAGS_WEAK_IMPORT = 0x1,
+    BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION = 0x8,
+
+    BIND_OPCODE_MASK = 0xF0,
+    BIND_IMMEDIATE_MASK = 0x0F,
+    BIND_OPCODE_DONE = 0x00,
+    BIND_OPCODE_SET_DYLIB_ORDINAL_IMM = 0x10,
+    BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB = 0x20,
+    BIND_OPCODE_SET_DYLIB_SPECIAL_IMM = 0x30,
+    BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM = 0x40,
+    BIND_OPCODE_SET_TYPE_IMM = 0x50,
+    BIND_OPCODE_SET_ADDEND_SLEB = 0x60,
+    BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB = 0x70,
+    BIND_OPCODE_ADD_ADDR_ULEB = 0x80,
+    BIND_OPCODE_DO_BIND = 0x90,
+    BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB = 0xA0,
+    BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED = 0xB0,
+    BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB = 0xC0,
+    BIND_OPCODE_THREADED = 0xD0,
+    BIND_SUBOPCODE_THREADED_SET_BIND_ORDINAL_TABLE_SIZE_ULEB = 0x00,
+    BIND_SUBOPCODE_THREADED_APPLY = 0x01
+}
+
+enum
+{
+    EXPORT_SYMBOL_FLAGS_KIND_MASK = 0x03,
+    EXPORT_SYMBOL_FLAGS_KIND_REGULAR = 0x00,
+    EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL = 0x01,
+    EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE = 0x02,
+    EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION = 0x04,
+    EXPORT_SYMBOL_FLAGS_REEXPORT = 0x08,
+    EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER = 0x10
+}
+
+struct linker_option_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint count;
+}
+
+struct symseg_command
+{
+    uint cmd;
+    uint cmdsize;
+    uint offset;
+    uint size;
+}
+
+struct ident_command
+{
+    uint cmd;
+    uint cmdsize;
+}
+
+struct fvmfile_command
+{
+    uint cmd;
+    uint cmdsize;
+    lc_str name;
+    uint header_addr;
+}
+
+struct entry_point_command
+{
+    uint cmd;
+    uint cmdsize;
+    ulong entryoff;
+    ulong stacksize;
+}
+
+struct source_version_command
+{
+    uint cmd;
+    uint cmdsize;
+    ulong version_;
+}
+
+struct data_in_code_entry
+{
+    uint offset;
+    ushort length;
+    ushort kind;
+}
+
+enum
+{
+    DICE_KIND_DATA = 0x0001,
+    DICE_KIND_JUMP_TABLE8 = 0x0002,
+    DICE_KIND_JUMP_TABLE16 = 0x0003,
+    DICE_KIND_JUMP_TABLE32 = 0x0004,
+    DICE_KIND_ABS_JUMP_TABLE32 = 0x0005,
+}
+
+struct tlv_descriptor
+{
+    void* function(tlv_descriptor*) thunk;
+    c_ulong key;
+    c_ulong offset;
+}
+
+struct note_command
+{
+    uint cmd;
+    uint cmdsize;
+    char[16] data_owner = 0;
+    ulong offset;
+    ulong size;
+}
diff --git a/libphobos/libdruntime/core/sys/darwin/string.d b/libphobos/libdruntime/core/sys/darwin/string.d
new file mode 100644
index 00000000000..bd65fde27bc
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/darwin/string.d
@@ -0,0 +1,31 @@ 
+/**
+  * D header file for Darwin string.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.darwin.string;
+
+public import core.stdc.string;
+import core.sys.darwin.sys.cdefs;
+
+version (OSX)
+    version = Darwin;
+else version (iOS)
+    version = Darwin;
+else version (TVOS)
+    version = Darwin;
+else version (WatchOS)
+    version = Darwin;
+
+version (Darwin):
+extern (C):
+nothrow:
+@nogc:
+
+static if (__DARWIN_C_LEVEL >= __DARWIN_C_FULL)
+{
+    // ^ __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
+    pure void* memmem(return const void* haystack, size_t haystacklen, scope const void* needle, size_t needlelen);
+}
diff --git a/libphobos/libdruntime/core/sys/dragonflybsd/string.d b/libphobos/libdruntime/core/sys/dragonflybsd/string.d
new file mode 100644
index 00000000000..b64178f6562
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/dragonflybsd/string.d
@@ -0,0 +1,22 @@ 
+/**
+  * D header file for DragonFlyBSD string.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.dragonflybsd.string;
+
+public import core.stdc.string;
+import core.sys.dragonflybsd.sys.cdefs;
+
+version (DragonFlyBSD):
+extern (C):
+nothrow:
+@nogc:
+
+static if (__BSD_VISIBLE)
+{
+    pure void* memmem(return const void* haystack, size_t haystacklen, scope const void* needle, size_t needlelen);
+}
+
diff --git a/libphobos/libdruntime/core/sys/dragonflybsd/sys/socket.d b/libphobos/libdruntime/core/sys/dragonflybsd/sys/socket.d
new file mode 100644
index 00000000000..8ac54e2a8c2
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/dragonflybsd/sys/socket.d
@@ -0,0 +1,86 @@ 
+/**
+ * D header file for DragonFlyBSD
+ *
+ * License:   $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
+ */
+module core.sys.dragonflybsd.sys.socket;
+
+public import core.sys.posix.sys.socket;
+
+version (DragonFlyBSD):
+extern(C):
+@nogc:
+nothrow:
+
+enum
+{
+    AF_IMPLINK          = 3,
+    AF_PUP              = 4,
+    AF_CHAOS            = 5,
+    AF_NETBIOS          = 6,
+    AF_ISO              = 7,
+    AF_OSI              = AF_ISO,
+    AF_ECMA             = 8,
+    AF_DATAKIT          = 9,
+    AF_CCITT            = 10,
+    AF_SNA              = 11,
+    AF_DECnet           = 12,
+    AF_DLI              = 13,
+    AF_LAT              = 14,
+    AF_HYLINK           = 15,
+    AF_ROUTE            = 17,
+    AF_LINK             = 18,
+    pseudo_AF_XTP       = 19,
+    AF_COIP             = 20,
+    AF_CNT              = 21,
+    pseudo_AF_RTIP      = 22,
+    AF_SIP              = 24,
+    pseudo_AF_PIP       = 25,
+    AF_ISDN             = 26,
+    AF_E164             = AF_ISDN,
+    pseudo_AF_KEY       = 27,
+    AF_NATM             = 29,
+    AF_ATM              = 30,
+    pseudo_AF_HDRCMPLT  = 31,
+    AF_NETGRAPH         = 32,
+    AF_BLUETOOTH        = 33,
+    AF_MPLS             = 34,
+    AF_IEEE80211        = 35,
+}
+
+/* protocol families */
+enum PF_UNSPEC          = AF_UNSPEC;
+enum PF_LOCAL           = AF_LOCAL;
+enum PF_UNIX            = PF_LOCAL;
+enum PF_INET            = AF_INET;
+enum PF_IMPLINK         = AF_IMPLINK;
+enum PF_PUP             = AF_PUP;
+enum PF_CHAOS           = AF_CHAOS;
+enum PF_NETBIOS         = AF_NETBIOS;
+enum PF_ISO             = AF_ISO;
+enum PF_OSI             = AF_ISO;
+enum PF_ECMA            = AF_ECMA;
+enum PF_DATAKIT         = AF_DATAKIT;
+enum PF_CCITT           = AF_CCITT;
+enum PF_SNA             = AF_SNA;
+enum PF_DECnet          = AF_DECnet;
+enum PF_DLI             = AF_DLI;
+enum PF_LAT             = AF_LAT;
+enum PF_HYLINK          = AF_HYLINK;
+enum PF_APPLETALK       = AF_APPLETALK;
+enum PF_ROUTE           = AF_ROUTE;
+enum PF_LINK            = AF_LINK;
+enum PF_XTP             = pseudo_AF_XTP;
+enum PF_COIP            = AF_COIP;
+enum PF_CNT             = AF_CNT;
+enum PF_SIP             = AF_SIP;
+enum PF_IPX             = AF_IPX;
+enum PF_RTIP            = pseudo_AF_RTIP;
+enum PF_PIP             = pseudo_AF_PIP;
+enum PF_ISDN            = AF_ISDN;
+enum PF_KEY             = pseudo_AF_KEY;
+enum PF_INET6           = AF_INET6;
+enum PF_NATM            = AF_NATM;
+enum PF_ATM             = AF_ATM;
+enum PF_NETGRAPH        = AF_NETGRAPH;
+enum PF_BLUETOOTH       = AF_BLUETOOTH;
diff --git a/libphobos/libdruntime/core/sys/freebsd/string.d b/libphobos/libdruntime/core/sys/freebsd/string.d
new file mode 100644
index 00000000000..3602ea8e86b
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/freebsd/string.d
@@ -0,0 +1,21 @@ 
+/**
+  * D header file for FreeBSD string.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.freebsd.string;
+
+public import core.stdc.string;
+import core.sys.freebsd.sys.cdefs;
+
+version (FreeBSD):
+extern (C):
+nothrow:
+@nogc:
+
+static if (__BSD_VISIBLE)
+{
+    pure void* memmem(return const void* haystack, size_t haystacklen, scope const void* needle, size_t needlelen);
+}
diff --git a/libphobos/libdruntime/core/sys/freebsd/sys/elf64.d b/libphobos/libdruntime/core/sys/freebsd/sys/elf64.d
index 29c6e3c01b7..f208b017758 100644
--- a/libphobos/libdruntime/core/sys/freebsd/sys/elf64.d
+++ b/libphobos/libdruntime/core/sys/freebsd/sys/elf64.d
@@ -43,6 +43,15 @@  struct Elf64_Ehdr
     Elf64_Half    e_shstrndx;
 }
 
+struct Elf64_Lib
+{
+    Elf64_Word    l_name;
+    Elf64_Word    l_time_stamp;
+    Elf64_Word    l_checksum;
+    Elf64_Word    l_version;
+    Elf64_Word    l_flags;
+}
+
 struct Elf64_Shdr
 {
     Elf64_Word    sh_name;
diff --git a/libphobos/libdruntime/core/sys/freebsd/sys/elf_common.d b/libphobos/libdruntime/core/sys/freebsd/sys/elf_common.d
index 6188d0ef7a4..455de95afb3 100644
--- a/libphobos/libdruntime/core/sys/freebsd/sys/elf_common.d
+++ b/libphobos/libdruntime/core/sys/freebsd/sys/elf_common.d
@@ -852,3 +852,105 @@  enum R_X86_64_DTPOFF32 =        21;
 enum R_X86_64_GOTTPOFF =        22;
 enum R_X86_64_TPOFF32 =         23;
 enum R_X86_64_IRELATIVE =       37;
+
+version (PPC64)
+{
+enum __ELF_WORD_SIZE = 64;
+enum ELF_ARCH = EM_PPC64;
+enum ELF_MACHINE_OK(x) = ((x) == EM_PPC64);
+}
+version (PPC)
+{
+enum __ELF_WORD_SIZE = 32;
+enum ELF_ARCH = EM_PPC;
+enum ELF_ARCH32 = EM_PPC;
+enum ELF_MACHINE_OK(x) = ((x) == EM_PPC);
+}
+
+/**
+ * Auxiliary vector entries for passing information to the interpreter.
+ *
+ * The PowerPC supplement to the SVR4 ABI specification names this "auxv_t",
+ * but POSIX lays claim to all symbols ending with "_t".
+ */
+
+struct Elf32_Auxinfo
+{
+    int a_type;
+    union a_un
+    {
+        long    a_val;
+        void    *a_ptr;
+        void function(void* a) a_fcn;
+    }
+}
+
+struct Elf64_Auxinfo
+{
+    long a_type;
+    union a_un
+    {
+        long    a_val;
+        void    *a_ptr;
+        void function(void* a) a_fcn;
+    }
+}
+
+// __ElfType(Auxinfo);
+
+/**
+ * Values for a_type.
+ */
+
+enum AT_NULL   = 0;
+enum AT_IGNORE = 1;
+enum AT_EXECFD = 2;
+enum AT_PHDR  = 3;
+enum AT_PHENT = 4;
+enum AT_PHNUM = 5;
+enum AT_PAGESZ = 6;
+enum AT_BASE  = 7;
+enum AT_FLAGS = 8;
+enum AT_ENTRY = 9;
+enum AT_DCACHEBSIZE = 10;
+enum AT_ICACHEBSIZE = 11;
+enum AT_UCACHEBSIZE = 12;
+enum AT_EXECPATH  = 13;
+enum AT_CANARY    = 14;
+enum AT_CANARYLEN = 15;
+enum AT_OSRELDATE = 16;
+enum AT_NCPUS = 17;
+enum AT_PAGESIZES = 18;
+enum AT_PAGESIZESLEN = 19;
+enum AT_STACKPROT = 21;
+enum AT_TIMEKEEP  = 22;
+enum AT_COUNT = 23;
+
+/**
+ * Relocation types.
+ */
+
+enum R_PPC_COUNT =  37;
+enum R_PPC_EMB_COUNT =  (R_PPC_EMB_RELSDA - R_PPC_EMB_NADDR32 + 1);
+
+/**
+ * Define "machine" characteristics
+ */
+
+version (PPC64)
+{
+enum ELF_TARG_CLASS =   ELFCLASS64;
+enum ELF_TARG_DATA =    ELFDATA2MSB;
+enum ELF_TARG_MACH =    EM_PPC64;
+enum ELF_TARG_VER =     1;
+}
+
+version (PPC)
+{
+enum ELF_TARG_CLASS =   ELFCLASS32;
+enum ELF_TARG_DATA =    ELFDATA2MSB;
+enum ELF_TARG_MACH =    EM_PPC;
+enum ELF_TARG_VER =     1;
+}
+
+enum ET_DYN_LOAD_ADDR = 0x01010000;
diff --git a/libphobos/libdruntime/core/sys/linux/sched.d b/libphobos/libdruntime/core/sys/linux/sched.d
index b53fa045400..53cd0ef6822 100644
--- a/libphobos/libdruntime/core/sys/linux/sched.d
+++ b/libphobos/libdruntime/core/sys/linux/sched.d
@@ -1,9 +1,11 @@ 
 /*******************************************************************************
 
-    D binding for Linux specific scheduler control methods.
+    D binding for Linux specific scheduler control and thread spawning
+    methods.
 
-    Defines functions sched_setaffinity and sched_getaffinity  and the data
-    types they operate on.
+    Defines functions sched_setaffinity and sched_getaffinity and the data
+    types they operate on, as well as clone and unshare and their related
+    constants.
 
     Copyright:  Copyright (c) 2016 Sociomantic Labs. All rights reserved.
     License:    $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
@@ -100,6 +102,24 @@  int CPU_COUNT(cpu_set_t* cpusetp) pure
     return __CPU_COUNT_S(cpu_set_t.sizeof, cpusetp);
 }
 
-/* Functions */
+/* Scheduler control functions */
 int sched_setaffinity(pid_t pid, size_t cpusetsize, cpu_set_t *mask);
 int sched_getaffinity(pid_t pid, size_t cpusetsize, cpu_set_t *mask);
+
+/* Clone and related functions and constants */
+int clone(int function(void*), void* child_stack, int flags, void* arg, ...);
+int unshare(int flags) @trusted;
+
+enum CLONE_FILES = 0x400;
+enum CLONE_FS = 0x200;
+enum CLONE_NEWCGROUP = 0x2000000;
+enum CLONE_NEWIPC = 0x8000000;
+enum CLONE_NEWNET = 0x40000000;
+enum CLONE_NEWNS = 0x20000;
+enum CLONE_NEWPID = 0x20000000;
+enum CLONE_NEWUSER = 0x10000000;
+enum CLONE_NEWUTS = 0x4000000;
+enum CLONE_SIGHAND = 0x800;
+enum CLONE_SYSVSEM = 0x40000;
+enum CLONE_THREAD = 0x10000;
+enum CLONE_VM = 0x100;
diff --git a/libphobos/libdruntime/core/sys/linux/string.d b/libphobos/libdruntime/core/sys/linux/string.d
new file mode 100644
index 00000000000..a388c8ba1ae
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/linux/string.d
@@ -0,0 +1,21 @@ 
+/**
+  * D header file for Linux string.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.linux.string;
+
+public import core.stdc.string;
+import core.sys.linux.config;
+
+version (linux):
+extern (C):
+nothrow:
+@nogc:
+
+static if (__USE_GNU)
+{
+    pure void* memmem(return const void* haystack, size_t haystacklen, scope const void* needle, size_t needlelen);
+}
diff --git a/libphobos/libdruntime/core/sys/netbsd/string.d b/libphobos/libdruntime/core/sys/netbsd/string.d
new file mode 100644
index 00000000000..ab9ced80cf1
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/netbsd/string.d
@@ -0,0 +1,21 @@ 
+/**
+  * D header file for NetBSD string.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.netbsd.string;
+
+public import core.stdc.string;
+import core.sys.netbsd.sys.featuretest;
+
+version (NetBSD):
+extern (C):
+nothrow:
+@nogc:
+
+static if (_NETBSD_SOURCE)
+{
+    pure void* memmem(return const void* haystack, size_t haystacklen, scope const void* needle, size_t needlelen);
+}
diff --git a/libphobos/libdruntime/core/sys/netbsd/sys/featuretest.d b/libphobos/libdruntime/core/sys/netbsd/sys/featuretest.d
new file mode 100644
index 00000000000..3901ea9703b
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/netbsd/sys/featuretest.d
@@ -0,0 +1,12 @@ 
+/**
+  * D header file for NetBSD featuretest;.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.netbsd.sys.featuretest;
+
+version (NetBSD):
+
+enum _NETBSD_SOURCE = true;
diff --git a/libphobos/libdruntime/core/sys/openbsd/string.d b/libphobos/libdruntime/core/sys/openbsd/string.d
new file mode 100644
index 00000000000..8d35b9c9c12
--- /dev/null
+++ b/libphobos/libdruntime/core/sys/openbsd/string.d
@@ -0,0 +1,21 @@ 
+/**
+  * D header file for OpenBSD string.
+  *
+  * Copyright: Copyright © 2019, The D Language Foundation
+  * License: <a href="http://www.boost.org/LICENSE_1_0.txt">Boost License 1.0</a>.
+  * Authors: Ernesto Castellotti
+  */
+module core.sys.openbsd.string;
+
+public import core.stdc.string;
+import core.sys.openbsd.sys.cdefs;
+
+version (OpenBSD):
+extern (C):
+nothrow:
+@nogc:
+
+static if (__BSD_VISIBLE)
+{
+    pure void* memmem(return const void* haystack, size_t haystacklen, scope const void* needle, size_t needlelen);
+}
diff --git a/libphobos/libdruntime/core/sys/posix/aio.d b/libphobos/libdruntime/core/sys/posix/aio.d
index 817ff90bf1d..1165446be5c 100644
--- a/libphobos/libdruntime/core/sys/posix/aio.d
+++ b/libphobos/libdruntime/core/sys/posix/aio.d
@@ -72,6 +72,10 @@  version (CRuntime_Glibc)
         }
     }
 }
+else version (CRuntime_Bionic)
+{
+    // Bionic does not define aiocb.
+}
 else version (CRuntime_Musl)
 {
     // https://git.musl-libc.org/cgit/musl/tree/include/aio.h
@@ -446,6 +450,10 @@  version (CRuntime_Glibc)
         int lio_listio(int mode, const(aiocb*)* aiocb_list, int nitems, sigevent* sevp);
     }
 }
+else version (CRuntime_Bionic)
+{
+    // Bionic does not implement aio.h
+}
 else version (CRuntime_UClibc)
 {
     static if (__USE_LARGEFILE64)
@@ -517,7 +525,7 @@  version (CRuntime_Glibc)
         void aio_init(const(aioinit)* init);
     }
 }
-version (CRuntime_UClibc)
+else version (CRuntime_UClibc)
 {
     static if (__USE_GNU)
     {
diff --git a/libphobos/libdruntime/core/sys/posix/dirent.d b/libphobos/libdruntime/core/sys/posix/dirent.d
index 95246fc4471..cea22d21025 100644
--- a/libphobos/libdruntime/core/sys/posix/dirent.d
+++ b/libphobos/libdruntime/core/sys/posix/dirent.d
@@ -506,7 +506,7 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-
+    int readdir_r(DIR*, dirent*, dirent**);
 }
 else version (CRuntime_UClibc)
 {
@@ -591,6 +591,8 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    void   seekdir(DIR*, c_long);
+    c_long telldir(DIR*);
 }
 else version (CRuntime_UClibc)
 {
diff --git a/libphobos/libdruntime/core/sys/posix/pthread.d b/libphobos/libdruntime/core/sys/posix/pthread.d
index 8c9df3724af..1d0d294f251 100644
--- a/libphobos/libdruntime/core/sys/posix/pthread.d
+++ b/libphobos/libdruntime/core/sys/posix/pthread.d
@@ -854,7 +854,15 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    enum PTHREAD_BARRIER_SERIAL_THREAD = -1;
 
+    int pthread_barrier_destroy(pthread_barrier_t*);
+    int pthread_barrier_init(pthread_barrier_t*, in pthread_barrierattr_t*, uint);
+    int pthread_barrier_wait(pthread_barrier_t*);
+    int pthread_barrierattr_destroy(pthread_barrierattr_t*);
+    int pthread_barrierattr_getpshared(in pthread_barrierattr_t*, int*);
+    int pthread_barrierattr_init(pthread_barrierattr_t*);
+    int pthread_barrierattr_setpshared(pthread_barrierattr_t*, int);
 }
 else version (CRuntime_UClibc)
 {
@@ -880,6 +888,55 @@  else
 int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
 int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
 */
+version (CRuntime_Glibc)
+{
+    int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else version (FreeBSD)
+{
+    int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else version (DragonFlyBSD)
+{
+    int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else version (NetBSD)
+{
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else version (OpenBSD)
+{
+    int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else version (Darwin)
+{
+}
+else version (Solaris)
+{
+    int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else version (CRuntime_Bionic)
+{
+}
+else version (CRuntime_Musl)
+{
+    int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else version (CRuntime_UClibc)
+{
+    int pthread_condattr_getclock(in pthread_condattr_t*, clockid_t*);
+    int pthread_condattr_setclock(pthread_condattr_t*, clockid_t);
+}
+else
+{
+    static assert(false, "Unsupported platform");
+}
 
 //
 // Spinlock (SPI)
@@ -948,7 +1005,11 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-
+    int pthread_spin_destroy(pthread_spinlock_t*);
+    int pthread_spin_init(pthread_spinlock_t*, int);
+    int pthread_spin_lock(pthread_spinlock_t*);
+    int pthread_spin_trylock(pthread_spinlock_t*);
+    int pthread_spin_unlock(pthread_spinlock_t*);
 }
 else version (CRuntime_UClibc)
 {
@@ -1187,7 +1248,7 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-
+    int pthread_getcpuclockid(pthread_t, clockid_t*);
 }
 else version (CRuntime_UClibc)
 {
@@ -1256,7 +1317,9 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-
+    int pthread_mutex_timedlock(pthread_mutex_t*, in timespec*);
+    int pthread_rwlock_timedrdlock(pthread_rwlock_t*, in timespec*);
+    int pthread_rwlock_timedwrlock(pthread_rwlock_t*, in timespec*);
 }
 else version (CRuntime_UClibc)
 {
@@ -1693,7 +1756,12 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-
+    int pthread_condattr_getpshared(pthread_condattr_t*, int*);
+    int pthread_condattr_setpshared(pthread_condattr_t*, int);
+    int pthread_mutexattr_getpshared(pthread_mutexattr_t*, int*);
+    int pthread_mutexattr_setpshared(pthread_mutexattr_t*, int);
+    int pthread_rwlockattr_getpshared(pthread_rwlockattr_t*, int*);
+    int pthread_rwlockattr_setpshared(pthread_rwlockattr_t*, int);
 }
 else version (CRuntime_UClibc)
 {
diff --git a/libphobos/libdruntime/core/sys/posix/pwd.d b/libphobos/libdruntime/core/sys/posix/pwd.d
index a90c9402880..9d9aaa3b361 100644
--- a/libphobos/libdruntime/core/sys/posix/pwd.d
+++ b/libphobos/libdruntime/core/sys/posix/pwd.d
@@ -172,7 +172,8 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-    struct passwd {
+    struct passwd
+    {
         char *pw_name;
         char *pw_passwd;
         uid_t pw_uid;
@@ -257,6 +258,8 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    int getpwnam_r(in char*, passwd*, char*, size_t, passwd**);
+    int getpwuid_r(uid_t, passwd*, char*, size_t, passwd**);
 }
 else version (CRuntime_UClibc)
 {
@@ -325,8 +328,9 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-    int getpwnam_r(in char*, passwd*, char*, size_t, passwd**);
-    int getpwuid_r(uid_t, passwd*, char*, size_t, passwd**);
+    void    endpwent();
+    passwd* getpwent();
+    void    setpwent();
 }
 else version (CRuntime_UClibc)
 {
diff --git a/libphobos/libdruntime/core/sys/posix/setjmp.d b/libphobos/libdruntime/core/sys/posix/setjmp.d
index fcdbca496c4..38d4f7086f2 100644
--- a/libphobos/libdruntime/core/sys/posix/setjmp.d
+++ b/libphobos/libdruntime/core/sys/posix/setjmp.d
@@ -22,6 +22,8 @@  extern (C) nothrow @nogc:
 
 version (RISCV32) version = RISCV_Any;
 version (RISCV64) version = RISCV_Any;
+version (PPC) version = PPC_Any;
+version (PPC64) version = PPC_Any;
 
 //
 // Required
@@ -210,6 +212,11 @@  else version (FreeBSD)
         // __int128_t
         struct _jmp_buf { long[2][_JBLEN + 1] _jb; };
     }
+    else version (PPC_Any)
+    {
+        enum _JBLEN = 100;
+        struct _jmp_buf { long[_JBLEN + 1] _jb; }
+    }
     else
         static assert(0);
     alias _jmp_buf[1] jmp_buf;
@@ -417,6 +424,10 @@  else version (FreeBSD)
         // __int128_t
         struct _sigjmp_buf { long[2][_JBLEN + 1] _jb; };
     }
+    else version (PPC_Any)
+    {
+        struct _sigjmp_buf { long[_JBLEN + 1] _sjb; }
+    }
     else
         static assert(0);
     alias _sigjmp_buf[1] sigjmp_buf;
diff --git a/libphobos/libdruntime/core/sys/posix/signal.d b/libphobos/libdruntime/core/sys/posix/signal.d
index 574bf8c7c3a..ed3985eee4d 100644
--- a/libphobos/libdruntime/core/sys/posix/signal.d
+++ b/libphobos/libdruntime/core/sys/posix/signal.d
@@ -1136,55 +1136,57 @@  else version (NetBSD)
     enum SIG_UNBLOCK = 2;
     enum SIG_SETMASK = 3;
 
-    union sigval_t {
-        int     sival_int;
-        void    *sival_ptr;
-    };
-    struct _rt{
-        pid_t   _pid;
-        uid_t   _uid;
-        sigval_t        _value;
-    };
-    struct _child{
-        pid_t   _pid;
-        uid_t   _uid;
-        int     _status;
-        clock_t _utime;
-        clock_t _stime;
-    };
-   struct _fault{
-        void   *_addr;
-        int     _trap;
-        int     _trap2;
-        int     _trap3;
-    };
-    struct _poll{
-        long    _band;
-        int     _fd;
-    };
-    union _reason{
-        _rt rt;
-        _child child;
-        _fault fault;
-        _poll poll;
-    };
-    struct _ksiginfo {
+    union sigval_t
+    {
+        int   sival_int;
+        void* sival_ptr;
+    }
+
+    struct _ksiginfo
+    {
         int     _signo;
         int     _code;
         int     _errno;
-/+#ifdef _LP64
-        /* In _LP64 the union starts on an 8-byte boundary. */
-        int     _pad;
-#endif+/
-        _reason reason;
-    };
+        version (D_LP64)
+            int _pad;
 
+        union reason_t
+        {
+            struct rt_t
+            {
+                pid_t    _pid;
+                uid_t    _uid;
+                sigval_t _value;
+            } rt_t _rt;
+            struct child_t
+            {
+                pid_t   _pid;
+                uid_t   _uid;
+                int     _status;
+                clock_t _utime;
+                clock_t _stime;
+            } child_t _child;
+            struct fault_t
+            {
+                void* _addr;
+                int   _trap;
+                int   _trap2;
+                int   _trap3;
+            } fault_t fault;
+            struct poll_t
+            {
+                c_long _band;
+                int  _fd;
+            } poll_t _poll;
+        }
+        reason_t _reason;
+    }
 
     union siginfo_t
     {
-        ubyte[128] si_pad;/* Total size; for future expansion */
+        ubyte[128] si_pad;
         _ksiginfo _info;
-        @property ref c_long si_band() return { return _info.reason.poll._band; }
+        @property ref c_long si_band() return { return _info._reason._poll._band; }
     }
 
     enum SI_USER    = 0;
@@ -1589,27 +1591,53 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-    struct sigset_t {
-        ulong[128/long.sizeof] __bits;
+    struct sigset_t
+    {
+        c_ulong[128/c_long.sizeof] __bits;
     }
 
-    enum SIG_BLOCK      = 0;
-    enum SIG_UNBLOCK    = 1;
-    enum SIG_SETMASK    = 2;
+    version (MIPS_Any)
+    {
+        enum SIG_BLOCK      = 1;
+        enum SIG_UNBLOCK    = 2;
+        enum SIG_SETMASK    = 3;
+    }
+    else
+    {
+        enum SIG_BLOCK      = 0;
+        enum SIG_UNBLOCK    = 1;
+        enum SIG_SETMASK    = 2;
+    }
 
-    struct siginfo_t {
-        int si_signo, si_errno, si_code;
-        union __si_fields_t {
-            char[128 - 2*int.sizeof - long.sizeof] __pad = 0;
-            struct __si_common_t {
-                union __first_t {
-                    struct __piduid_t {
+    struct siginfo_t
+    {
+        int si_signo;
+        version (MIPS_Any)  // __SI_SWAP_ERRNO_CODE
+        {
+            int si_code;
+            int si_errno;
+        }
+        else
+        {
+            int si_errno;
+            int si_code;
+        }
+        union __si_fields_t
+        {
+            char[128 - 2*int.sizeof - c_long.sizeof] __pad = 0;
+            struct __si_common_t
+            {
+                union __first_t
+                {
+                    struct __piduid_t
+                    {
                         pid_t si_pid;
                         uid_t si_uid;
                     }
                     __piduid_t __piduid;
 
-                    struct __timer_t {
+                    struct __timer_t
+                    {
                         int si_timerid;
                         int si_overrun;
                     }
@@ -1617,11 +1645,14 @@  else version (CRuntime_Musl)
                 }
                 __first_t __first;
 
-                union __second_t {
+                union __second_t
+                {
                     sigval si_value;
-                    struct __sigchld_t {
+                    struct __sigchld_t
+                    {
                         int si_status;
-                        clock_t si_utime, si_stime;
+                        clock_t si_utime;
+                        clock_t si_stime;
                     }
                     __sigchld_t __sigchld;
                 }
@@ -1629,11 +1660,14 @@  else version (CRuntime_Musl)
             }
             __si_common_t __si_common;
 
-            struct __sigfault_t {
+            struct __sigfault_t
+            {
                 void *si_addr;
                 short si_addr_lsb;
-                union __first_t {
-                    struct __addr_bnd_t {
+                union __first_t
+                {
+                    struct __addr_bnd_t
+                    {
                         void *si_lower;
                         void *si_upper;
                     }
@@ -1644,13 +1678,15 @@  else version (CRuntime_Musl)
             }
             __sigfault_t __sigfault;
 
-            struct __sigpoll_t {
-                long si_band;
+            struct __sigpoll_t
+            {
+                c_long si_band;
                 int si_fd;
             }
             __sigpoll_t __sigpoll;
 
-            struct __sigsys_t {
+            struct __sigsys_t
+            {
                 void *si_call_addr;
                 int si_syscall;
                 uint si_arch;
@@ -3030,7 +3066,177 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
-    enum SA_RESTART     = 0x10000000;
+    version (MIPS_Any)
+    {
+        enum SIGPOLL   = 22;
+        enum SIGPROF   = 29;
+        enum SIGSYS    = 12;
+        enum SIGTRAP   = 5;
+        enum SIGVTALRM = 28;
+        enum SIGXCPU   = 30;
+        enum SIGXFSZ   = 31;
+
+        enum SA_ONSTACK   = 0x08000000;
+        enum SA_RESETHAND = 0x80000000;
+        enum SA_RESTART   = 0x10000000;
+        enum SA_SIGINFO   = 8;
+        enum SA_NOCLDWAIT = 0x10000;
+        enum SA_NODEFER   = 0x40000000;
+    }
+    else
+    {
+        enum SIGPOLL   = 29;
+        enum SIGPROF   = 27;
+        enum SIGSYS    = 31;
+        enum SIGTRAP   = 5;
+        enum SIGVTALRM = 26;
+        enum SIGXCPU   = 24;
+        enum SIGXFSZ   = 25;
+
+        enum SA_ONSTACK   = 0x08000000;
+        enum SA_RESETHAND = 0x80000000;
+        enum SA_RESTART   = 0x10000000;
+        enum SA_SIGINFO   = 4;
+        enum SA_NOCLDWAIT = 2;
+        enum SA_NODEFER   = 0x40000000;
+    }
+
+    enum SS_ONSTACK = 1;
+    enum SS_DISABLE = 2;
+
+    version (ARM)
+    {
+        enum MINSIGSTKSZ = 2048;
+        enum SIGSTKSZ    = 8192;
+    }
+    else version (AArch64)
+    {
+        enum MINSIGSTKSZ = 6144;
+        enum SIGSTKSZ    = 12288;
+    }
+    else version (IBMZ_Any)
+    {
+        enum MINSIGSTKSZ = 4096;
+        enum SIGSTKSZ    = 10240;
+    }
+    else version (MIPS_Any)
+    {
+        enum MINSIGSTKSZ = 2048;
+        enum SIGSTKSZ    = 8192;
+    }
+    else version (PPC_Any)
+    {
+        enum MINSIGSTKSZ = 4096;
+        enum SIGSTKSZ    = 10240;
+    }
+    else version (X86_Any)
+    {
+        enum MINSIGSTKSZ = 2048;
+        enum SIGSTKSZ    = 8192;
+    }
+    else
+        static assert(0, "unimplemented");
+
+    //ucontext_t (defined in core.sys.posix.ucontext)
+    //mcontext_t (defined in core.sys.posix.ucontext)
+
+    version (MIPS_Any)
+    {
+        struct stack_t
+        {
+            void*  ss_sp;
+            size_t ss_size;
+            int    ss_flags;
+        }
+    }
+    else
+    {
+        struct stack_t
+        {
+            void*  ss_sp;
+            int    ss_flags;
+            size_t ss_size;
+        }
+    }
+
+    enum
+    {
+        ILL_ILLOPC = 1,
+        ILL_ILLOPN,
+        ILL_ILLADR,
+        ILL_ILLTRP,
+        ILL_PRVOPC,
+        ILL_PRVREG,
+        ILL_COPROC,
+        ILL_BADSTK
+    }
+
+    enum
+    {
+        FPE_INTDIV = 1,
+        FPE_INTOVF,
+        FPE_FLTDIV,
+        FPE_FLTOVF,
+        FPE_FLTUND,
+        FPE_FLTRES,
+        FPE_FLTINV,
+        FPE_FLTSUB
+    }
+
+    enum
+    {
+        SEGV_MAPERR = 1,
+        SEGV_ACCERR
+    }
+
+    enum
+    {
+        BUS_ADRALN = 1,
+        BUS_ADRERR,
+        BUS_OBJERR
+    }
+
+    enum
+    {
+        TRAP_BRKPT = 1,
+        TRAP_TRACE
+    }
+
+    enum
+    {
+        CLD_EXITED = 1,
+        CLD_KILLED,
+        CLD_DUMPED,
+        CLD_TRAPPED,
+        CLD_STOPPED,
+        CLD_CONTINUED
+    }
+
+    enum
+    {
+        POLL_IN = 1,
+        POLL_OUT,
+        POLL_MSG,
+        POLL_ERR,
+        POLL_PRI,
+        POLL_HUP
+    }
+
+    sigfn_t bsd_signal(int sig, sigfn_t func);
+    sigfn_t sigset(int sig, sigfn_t func);
+
+  nothrow:
+  @nogc:
+    sigfn_t2 bsd_signal(int sig, sigfn_t2 func);
+    sigfn_t2 sigset(int sig, sigfn_t2 func);
+
+    int killpg(pid_t, int);
+    int sigaltstack(const scope stack_t*, stack_t*);
+    int sighold(int);
+    int sigignore(int);
+    int siginterrupt(int, int);
+    int sigpause(int);
+    int sigrelse(int);
 }
 else version (CRuntime_UClibc)
 {
@@ -3485,7 +3691,7 @@  else version (CRuntime_Musl)
         int sigev_notify;
         void function(sigval) sigev_notify_function;
         pthread_attr_t *sigev_notify_attributes;
-        char[56 - 3 * long.sizeof] __pad = void;
+        char[56 - 3 * c_long.sizeof] __pad = void;
     }
 }
 else version (CRuntime_UClibc)
diff --git a/libphobos/libdruntime/core/sys/posix/sys/ioccom.d b/libphobos/libdruntime/core/sys/posix/sys/ioccom.d
old mode 100755
new mode 100644
index 5d6aa08d918..424c8a82307
--- a/libphobos/libdruntime/core/sys/posix/sys/ioccom.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/ioccom.d
@@ -66,3 +66,64 @@  version (OSX)
         return _IOC!(T)(IOC_INOUT, cast(uint)g, cast(uint)n, T.sizeof);
     }
 }
+else version (FreeBSD)
+{
+    /* FreeBSD ioctl's encode the command in the lower 16-bits
+     * and the size of any in/out parameters in the lower 13 bits of the upper
+     * 16-bits of a 32 bit unsigned integer. The high 3 bits of the upper
+     * 16-bits encode the in/out status of the parameter.
+     */
+    enum uint IOCPARM_SHIFT = 13; // number of bits for ioctl size
+    enum uint IOCPARM_MASK = ((1 << IOCPARM_SHIFT) - 1); // parameter length mask
+    uint IOCPARM_LEN(uint x) // to extract the encoded parameter length
+    {
+        return ((x >> 16) & IOCPARM_MASK);
+    }
+    uint IOCBASECMD(uint x) // to extract the encoded command
+    {
+        return (x & ~(IOCPARM_MASK << 16));
+    }
+    uint IOCGROUP(uint x) // to extract the encoded group
+    {
+        return ((x >> 8) & 0xff);
+    }
+
+    enum uint IOCPARM_MAX = (1 << IOCPARM_SHIFT); // max size of ioctl args
+
+    enum uint IOC_VOID = 0x20000000; // no parameters
+    enum uint IOC_OUT = 0x40000000; // copy parameters back
+    enum uint IOC_IN = 0x80000000; // copy parameters into
+    enum uint IOC_INOUT = (IOC_IN | IOC_OUT);
+    enum uint IOC_DIRMASK = (IOC_VOID|IOC_OUT|IOC_IN);
+
+    // encode the ioctl info into 32 bits
+    uint _IOC(uint inorout, uint group, uint num, size_t len)
+    {
+        return (inorout | ((len & IOCPARM_MASK) << 16) | (group << 8) | num);
+    }
+
+    // encode a command with no parameters
+    uint _IO(char g, int n)
+    {
+        return _IOC(IOC_VOID, cast(uint)g, cast(uint)n, cast(size_t)0);
+    }
+    uint _IOWINT(char g, int n)
+    {
+        return _IOC(IOC_VOID, cast(uint)g, cast(uint)n, int.sizeof);
+    }
+    // encode a command that returns info
+    uint _IOR(T)(char g, int n)
+    {
+        return _IOC(IOC_OUT, cast(uint)g, cast(uint)n, T.sizeof);
+    }
+    // encode a command that takes info
+    uint _IOW(T)(char g, int n)
+    {
+        return _IOC(IOC_IN, cast(uint)g, cast(uint)n, T.sizeof);
+    }
+    // encode a command that takes info and returns info
+    uint _IOWR(T)(char g, int n)
+    {
+        return _IOC(IOC_INOUT, cast(uint)g, cast(uint)n, T.sizeof);
+    }
+}
diff --git a/libphobos/libdruntime/core/sys/posix/sys/ioctl.d b/libphobos/libdruntime/core/sys/posix/sys/ioctl.d
index b8bb03be9a1..7c77e803ce9 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/ioctl.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/ioctl.d
@@ -15,6 +15,7 @@ 
 module core.sys.posix.sys.ioctl;
 
 import core.stdc.config;
+public import core.sys.posix.sys.ttycom;
 
 version (OSX)
     version = Darwin;
@@ -357,14 +358,6 @@  else version (FreeBSD)
         void* buf;
     }
 
-    struct winsize
-    {
-        ushort ws_row;
-        ushort ws_col;
-        ushort ws_xpixel;
-        ushort ws_ypixel;
-    }
-
     int ioctl(int, c_ulong, ...);
 }
 else version (NetBSD)
diff --git a/libphobos/libdruntime/core/sys/posix/sys/mman.d b/libphobos/libdruntime/core/sys/posix/sys/mman.d
index 6e8a7ea7912..f682320a359 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/mman.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/mman.d
@@ -137,6 +137,15 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    enum
+    {
+        POSIX_MADV_NORMAL = 0,
+        POSIX_MADV_RANDOM = 1,
+        POSIX_MADV_SEQUENTIAL = 2,
+        POSIX_MADV_WILLNEED = 3,
+        POSIX_MADV_DONTNEED = 4,
+    }
+    int posix_madvise(void *, size_t, int);
 }
 else version (CRuntime_UClibc)
 {
@@ -655,6 +664,14 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    enum
+    {
+        MCL_CURRENT = 1,
+        MCL_FUTURE = 2,
+    }
+
+    int mlockall(int);
+    int munlockall();
 }
 else version (CRuntime_UClibc)
 {
@@ -723,6 +740,8 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    int mlock(in void*, size_t);
+    int munlock(in void*, size_t);
 }
 else version (CRuntime_UClibc)
 {
@@ -834,6 +853,8 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    int shm_open(in char*, int, mode_t);
+    int shm_unlink(in char*);
 }
 else version (CRuntime_UClibc)
 {
diff --git a/libphobos/libdruntime/core/sys/posix/sys/socket.d b/libphobos/libdruntime/core/sys/posix/sys/socket.d
index a745da59c6e..791a59328f7 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/socket.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/socket.d
@@ -1359,41 +1359,8 @@  else version (DragonFlyBSD)
         AF_LOCAL            = 1,
         AF_UNIX             = AF_LOCAL,
         AF_INET             = 2,
-        AF_IMPLINK          = 3,
-        AF_PUP              = 4,
-        AF_CHAOS            = 5,
-        AF_NETBIOS          = 6,
-        AF_ISO              = 7,
-        AF_OSI              = AF_ISO,
-        AF_ECMA             = 8,
-        AF_DATAKIT          = 9,
-        AF_CCITT            = 10,
-        AF_SNA              = 11,
-        AF_DECnet           = 12,
-        AF_DLI              = 13,
-        AF_LAT              = 14,
-        AF_HYLINK           = 15,
         AF_APPLETALK        = 16,
-        AF_ROUTE            = 17,
-        AF_LINK             = 18,
-        pseudo_AF_XTP       = 19,
-        AF_COIP             = 20,
-        AF_CNT              = 21,
-        pseudo_AF_RTIP      = 22,
         AF_IPX              = 23,
-        AF_SIP              = 24,
-        pseudo_AF_PIP       = 25,
-        AF_ISDN             = 26,
-        AF_E164             = AF_ISDN,
-        pseudo_AF_KEY       = 27,
-        //AF_INET6            = 28,   // defined below
-        AF_NATM             = 29,
-        AF_ATM              = 30,
-        pseudo_AF_HDRCMPLT  = 31,
-        AF_NETGRAPH         = 32,
-        AF_BLUETOOTH        = 33,
-        AF_MPLS             = 34,
-        AF_IEEE80211        = 35,
     }
 
     struct sockaddr
@@ -1427,43 +1394,6 @@  else version (DragonFlyBSD)
         byte[_SS_PAD2SIZE] __ss_pad2;
     }
 
-    /* protocol families */
-    enum PF_UNSPEC          = AF_UNSPEC;
-    enum PF_LOCAL           = AF_LOCAL;
-    enum PF_UNIX            = PF_LOCAL;
-    enum PF_INET            = AF_INET;
-    enum PF_IMPLINK         = AF_IMPLINK;
-    enum PF_PUP             = AF_PUP;
-    enum PF_CHAOS           = AF_CHAOS;
-    enum PF_NETBIOS         = AF_NETBIOS;
-    enum PF_ISO             = AF_ISO;
-    enum PF_OSI             = AF_ISO;
-    enum PF_ECMA            = AF_ECMA;
-    enum PF_DATAKIT         = AF_DATAKIT;
-    enum PF_CCITT           = AF_CCITT;
-    enum PF_SNA             = AF_SNA;
-    enum PF_DECnet          = AF_DECnet;
-    enum PF_DLI             = AF_DLI;
-    enum PF_LAT             = AF_LAT;
-    enum PF_HYLINK          = AF_HYLINK;
-    enum PF_APPLETALK       = AF_APPLETALK;
-    enum PF_ROUTE           = AF_ROUTE;
-    enum PF_LINK            = AF_LINK;
-    enum PF_XTP             = pseudo_AF_XTP;
-    enum PF_COIP            = AF_COIP;
-    enum PF_CNT             = AF_CNT;
-    enum PF_SIP             = AF_SIP;
-    enum PF_IPX             = AF_IPX;
-    enum PF_RTIP            = pseudo_AF_RTIP;
-    enum PF_PIP             = pseudo_AF_PIP;
-    enum PF_ISDN            = AF_ISDN;
-    enum PF_KEY             = pseudo_AF_KEY;
-    enum PF_INET6           = AF_INET6;
-    enum PF_NATM            = AF_NATM;
-    enum PF_ATM             = AF_ATM;
-    enum PF_NETGRAPH        = AF_NETGRAPH;
-    enum PF_BLUETOOTH       = AF_BLUETOOTH;
-
     struct msghdr
     {
         void*               msg_name;
@@ -1928,10 +1858,10 @@  else version (CRuntime_Musl)
         c_ulong     __ss_align;
     }
 
-    enum {
+    enum
+    {
         SOCK_STREAM = 1,
         SOCK_DGRAM = 2,
-        SOCK_RAW = 3,
         SOCK_RDM = 4,
         SOCK_SEQPACKET = 5,
         SOCK_DCCP = 6,
@@ -2374,6 +2304,10 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    enum
+    {
+        SOCK_RAW    = 3
+    }
 }
 else version (CRuntime_UClibc)
 {
diff --git a/libphobos/libdruntime/core/sys/posix/sys/ttycom.d b/libphobos/libdruntime/core/sys/posix/sys/ttycom.d
old mode 100755
new mode 100644
index a559b1e35cc..d1530979cca
--- a/libphobos/libdruntime/core/sys/posix/sys/ttycom.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/ttycom.d
@@ -108,3 +108,99 @@  version (OSX)
     enum uint SLIPDISC = 4;       // serial IP discipline
     enum uint PPPDISC  = 5;       // PPP discipline
 }
+else version (FreeBSD)
+{
+    struct winsize {
+        ushort  ws_row;     // rows, in characters
+        ushort  ws_col;     // columns, in characters
+        ushort  ws_xpixel;  // horizontal size, pixels
+        ushort  ws_ypixel;  // vertical size, pixels
+    }
+
+    // Serial/TTY ioctl's
+                                               // 0-2 compat
+                                               // 3-7 unused
+                                               // 8-10 compat
+                                               // 11-12 unused
+    enum uint TIOCEXCL  = _IO('t', 13);        // set exclusive use of tty
+    enum uint TIOCNXCL  = _IO('t', 14);        // reset exclusive use of tty
+    enum uint TIOCGPTN  = _IOR!(int)('t', 15); // get pts number
+    enum uint TIOCFLUSH = _IOW!(int)('t', 16); // flush buffers
+                            // 17-18 compat
+    enum uint TIOCGETA  = _IOR!(termios)('t', 19); // get termios struct
+    enum uint TIOCSETA  = _IOW!(termios)('t', 20); // set termios struct
+    enum uint TIOCSETAW = _IOW!(termios)('t', 21); // drain output, set
+    enum uint TIOCSETAF = _IOW!(termios)('t', 22); // drn out, fls in, set
+                            // 23-25 unused
+    enum uint TIOCGETD  = _IOR!(int)('t', 26); // get line discipline
+    enum uint TIOCSETD  = _IOW!(int)('t', 27); // set line discipline
+    enum uint TIOCPTMASTER = _IO('t', 28);     // pts master validation
+                            // 29-85 unused
+    enum uint TIOCGDRAINWAIT = _IOR!(int)('t', 86); // get ttywait timeout
+    enum uint TIOCSDRAINWAIT = _IOW!(int)('t', 87); // set ttywait timeout
+                            // 88 unused
+                            // 89-91 conflicts: tun and tap
+    enum uint TIOCTIMESTAMP = _IOR!(timeval)('t', 89); // enable/get timestamp of last input event
+    enum uint TIOCMGDTRWAIT = _IOR!(int)('t', 90); // modem: get wait on close
+    enum uint TIOCMSDTRWAIT = _IOW!(int)('t', 91); // modem: set wait on close
+                            // 92-93 tun and tap
+                            // 94-97 conflicts: tun and tap
+    enum uint TIOCDRAIN = _IO('t', 94); // wait till output drained
+    enum uint TIOCSIG   = _IOWINT('t', 95); // pty: generate signal
+    enum uint TIOCEXT   = _IOW!(int)('t', 96); // pty: external processing
+    enum uint TIOCSCTTY = _IO('t', 97);        // become controlling tty
+    enum uint TIOCCONS  = _IOW!(int)('t', 98); // become virtual console
+    enum uint TIOCGSID  = _IOR!(int)('t', 99); // get session id
+                            // 100 unused
+    enum uint TIOCSTAT  = _IO('t', 101);       // simulate ^T status message
+    enum uint TIOCUCNTL = _IOW!(int)('t', 102); // pty: set/clr usr cntl mode
+    enum uint   UIOCCMD(n) = _IO('u', n);       // usr cntl op "n"
+    enum uint TIOCSWINSZ = _IOW!(winsize)('t', 103); // set window size
+    enum uint TIOCGWINSZ = _IOR!(winsize)('t', 104); // get window size
+                            // 105 unused
+    enum uint TIOCMGET  = _IOR!(int)('t', 106); // get all modem bits
+    enum uint   TIOCM_LE  = 0x01;               // line enable
+    enum uint   TIOCM_DTR = 0x02;               // data terminal ready
+    enum uint   TIOCM_RTS = 0x04;               // request to send
+    enum uint   TIOCM_ST  = 0x08;               // secondary transmit
+    enum uint   TIOCM_SR  = 0x10;               // secondary receive
+    enum uint   TIOCM_CTS = 0x20;               // clear to send
+    enum uint   TIOCM_DCD = 0x40;               // data carrier detect
+    enum uint   TIOCM_RI  = 0x80;               // ring indicate
+    enum uint   TIOCM_DSR = 0x100;              // data set ready
+    enum uint   TIOCM_CD  = TIOCM_DCD;
+    enum uint   TIOCM_CAR = TIOCM_DCD;
+    enum uint   TIOCM_RNG = TIOCM_RI;
+    enum uint TIOCMBIC  = _IOW!(int)('t', 107); // bic modem bits
+    enum uint TIOCMBIS  = _IOW!(int)('t', 108); // bis modem bits
+    enum uint TIOCMSET  = _IOW!(int)('t', 109); // set all modem bits
+    enum uint TIOCSTART = _IO('t', 110);        // start output like ^Q
+    enum uint TIOCSTOP  = _IO('t', 111);        // stop output like ^S
+    enum uint TIOCPKT   = _IOW!(int)('t', 112); // pty: set/clr packet mode
+    enum uint TIOCPKT_DATA       = 0x00;        // data packet
+    enum uint TIOCPKT_FLUSHREAD  = 0x01;        // flush packet
+    enum uint TIOCPKT_FLUSHWRITE = 0x02;        // flush packet
+    enum uint TIOCPKT_STOP       = 0x04;        // stop output
+    enum uint TIOCPKT_START      = 0x08;        // start output
+    enum uint TIOCPKT_NOSTOP     = 0x10;        // no more ^S, ^Q
+    enum uint TIOCPKT_DOSTOP     = 0x20;        // now do ^S, ^Q
+    enum uint TIOCPKT_IOCTL      = 0x40;        // state change of pty driver
+    enum uint TIOCNOTTY = _IO('t', 113);        // void tty association
+    enum uint TIOCSTI   = _IOW!(char)('t', 114); // simulate terminal input
+    enum uint TIOCOUTQ  = _IOR!(int)('t', 115); // output queue size
+                             // 116-117 compat
+    enum uint TIOCSPGRP = _IOW!(int)('t', 118); // set pgrp of tty
+    enum uint TIOCGPGRP = _IOR!(int)('t', 119); // get pgrp of tty
+
+    enum uint TIOCCDTR  = _IO('t', 120);       // clear data terminal ready
+    enum uint TIOCSDTR  = _IO('t', 121);       // set data terminal ready
+    enum uint TIOCCBRK  = _IO('t', 122);       // clear break bit
+    enum uint TIOCSBRK  = _IO('t', 123);       // set break bit
+                            // 124-127 compat
+
+    enum uint TTYDISC  = 0;       // termios tty line discipline
+    enum uint SLIPDISC = 4;       // serial IP discipline
+    enum uint PPPDISC  = 5;       // PPP discipline
+    enum uint NETGRAPHDISC = 6;   // Netgraph tty node discipline
+    enum uint H4DISC   = 7;       // Netgraph Blutooth H4 discipline
+}
diff --git a/libphobos/libdruntime/core/sys/posix/sys/types.d b/libphobos/libdruntime/core/sys/posix/sys/types.d
index 9270bf53ca9..6188047cf0e 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/types.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/types.d
@@ -112,20 +112,25 @@  version (CRuntime_Glibc)
 }
 else version (CRuntime_Musl)
 {
-    alias long      blksize_t;
-    alias ulong     nlink_t;
-    alias long      dev_t;
-    alias long      blkcnt_t;
-    alias ulong     ino_t;
-    alias long      off_t;
-    alias long      _Addr;
-    alias int       pid_t;
-    alias uint      uid_t;
-    alias uint      gid_t;
-    alias long      time_t;
-    alias long      clock_t;
-    alias ulong     pthread_t;
-    alias _Addr     ssize_t;
+    alias c_long     blksize_t;
+    alias c_ulong    nlink_t;
+    alias long       dev_t;
+    alias long       blkcnt_t;
+    alias ulong      ino_t;
+    alias long       off_t;
+    alias int        pid_t;
+    alias uint       uid_t;
+    alias uint       gid_t;
+    version (D_X32)
+        alias long   time_t;
+    else
+        alias c_long time_t;
+    alias c_long     clock_t;
+    alias c_ulong    pthread_t;
+    version (D_LP64)
+        alias c_long ssize_t;
+    else
+        alias int    ssize_t;
 }
 else version (Darwin)
 {
@@ -447,7 +452,10 @@  else version (CRuntime_Musl)
   }
     alias uint mode_t;
     alias uint id_t;
-    alias long suseconds_t;
+    version (D_X32)
+        alias long susseconds_t;
+    else
+        alias c_long suseconds_t;
 }
 else version (CRuntime_UClibc)
 {
@@ -750,40 +758,77 @@  version (CRuntime_Glibc)
 }
 else version (CRuntime_Musl)
 {
-    version (X86_64) {
+    version (D_LP64)
+    {
         union pthread_attr_t
         {
             int[14] __i;
             ulong[7] __s;
         }
+
         union pthread_cond_t
         {
             int[12] __i;
             void*[6] __p;
         }
+
         union pthread_mutex_t
         {
             int[10] __i;
             void*[5] __p;
         }
+
         union pthread_rwlock_t
         {
             int[14] __i;
             void*[7] __p;
         }
-        struct pthread_rwlockattr_t
+    }
+    else
+    {
+        union pthread_attr_t
+        {
+            int[9] __i;
+            uint[9] __s;
+        }
+
+        union pthread_cond_t
+        {
+            int[12] __i;
+            void*[12] __p;
+        }
+
+        union pthread_mutex_t
+        {
+            int[6] __i;
+            void*[6] __p;
+        }
+
+        union pthread_rwlock_t
         {
-            uint[2] __attr;
+            int[8] __i;
+            void*[8] __p;
         }
-        alias uint pthread_key_t;
-        alias uint pthread_condattr_t;
-        alias uint pthread_mutexattr_t;
-        alias int pthread_once_t;
     }
-    else
+
+    struct pthread_rwlockattr_t
     {
-        static assert (false, "Architecture unsupported");
+        uint[2] __attr;
+    }
+
+    alias uint pthread_key_t;
+
+    struct pthread_condattr_t
+    {
+        uint __attr;
     }
+
+    struct pthread_mutexattr_t
+    {
+        uint __attr;
+    }
+
+    alias int pthread_once_t;
 }
 else version (Darwin)
 {
@@ -1352,6 +1397,27 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    version (D_LP64)
+    {
+        union pthread_barrier_t
+        {
+            int[8] __i;
+            void*[4] __p;
+        }
+    }
+    else
+    {
+        union pthread_barrier_t
+        {
+            int[5] __i;
+            void*[5] __p;
+        }
+    }
+
+    struct pthread_barrierattr_t
+    {
+        uint __attr;
+    }
 }
 else version (CRuntime_UClibc)
 {
@@ -1407,6 +1473,10 @@  else version (CRuntime_UClibc)
 {
     alias int pthread_spinlock_t; // volatile
 }
+else version (CRuntime_Musl)
+{
+    alias int pthread_spinlock_t;
+}
 
 //
 // Timer (TMR)
diff --git a/libphobos/libdruntime/core/sys/posix/sys/wait.d b/libphobos/libdruntime/core/sys/posix/sys/wait.d
index af54450b07f..322326d990b 100644
--- a/libphobos/libdruntime/core/sys/posix/sys/wait.d
+++ b/libphobos/libdruntime/core/sys/posix/sys/wait.d
@@ -392,6 +392,19 @@  else version (CRuntime_Bionic)
 }
 else version (CRuntime_Musl)
 {
+    enum WEXITED    = 4;
+    enum WSTOPPED   = 2;
+    enum WCONTINUED = 8;
+    enum WNOWAIT    = 0x01000000;
+
+    enum idtype_t
+    {
+        P_ALL,
+        P_PID,
+        P_PGID
+    }
+
+    int waitid(idtype_t, id_t, siginfo_t*, int);
 }
 else version (CRuntime_UClibc)
 {
diff --git a/libphobos/libdruntime/core/sys/posix/time.d b/libphobos/libdruntime/core/sys/posix/time.d
index 4f62a92472e..2859558b2b9 100644
--- a/libphobos/libdruntime/core/sys/posix/time.d
+++ b/libphobos/libdruntime/core/sys/posix/time.d
@@ -127,22 +127,10 @@  CLOCK_MONOTONIC
 version (linux)
 {
     enum CLOCK_MONOTONIC          = 1;
-    // To be removed in December 2015.
-    static import core.sys.linux.time;
-    deprecated("Please import it from core.sys.linux.time instead.")
-        alias CLOCK_MONOTONIC_RAW = core.sys.linux.time.CLOCK_MONOTONIC_RAW; // non-standard
-    deprecated("Please import it from core.sys.linux.time instead.")
-        alias CLOCK_MONOTONIC_COARSE = core.sys.linux.time.CLOCK_MONOTONIC_COARSE; // non-standard
 }
 else version (FreeBSD)
 {   // time.h
     enum CLOCK_MONOTONIC         = 4;
-    // To be removed in December 2015.
-    static import core.sys.freebsd.time;
-    deprecated("Please import it from core.sys.freebsd.time instead.")
-        alias CLOCK_MONOTONIC_PRECISE = core.sys.freebsd.time.CLOCK_MONOTONIC_PRECISE;
-    deprecated("Please import it from core.sys.freebsd.time instead.")
-        alias CLOCK_MONOTONIC_FAST = core.sys.freebsd.time.CLOCK_MONOTONIC_FAST;
 }
 else version (NetBSD)
 {
@@ -157,12 +145,6 @@  else version (OpenBSD)
 else version (DragonFlyBSD)
 {   // time.h
     enum CLOCK_MONOTONIC         = 4;
-    // To be removed in December 2015.
-    static import core.sys.dragonflybsd.time;
-    deprecated("Please import it from core.sys.dragonflybsd.time instead.")
-        alias CLOCK_MONOTONIC_PRECISE = core.sys.dragonflybsd.time.CLOCK_MONOTONIC_PRECISE;
-    deprecated("Please import it from core.sys.dragonflybsd.time instead.")
-        alias CLOCK_MONOTONIC_FAST = core.sys.dragonflybsd.time.CLOCK_MONOTONIC_FAST;
 }
 else version (Darwin)
 {
@@ -236,10 +218,6 @@  version (CRuntime_Glibc)
     }
 
     enum CLOCK_REALTIME         = 0;
-    // To be removed in December 2015.
-    static import core.sys.linux.time;
-    deprecated("Please import it from core.sys.linux.time instead.")
-        alias CLOCK_REALTIME_COARSE = core.sys.linux.time.CLOCK_REALTIME_COARSE; // non-standard
     enum TIMER_ABSTIME          = 0x01;
 
     alias int clockid_t;
diff --git a/libphobos/libdruntime/core/sys/posix/ucontext.d b/libphobos/libdruntime/core/sys/posix/ucontext.d
index c37d45fa68a..49a7c3e389a 100644
--- a/libphobos/libdruntime/core/sys/posix/ucontext.d
+++ b/libphobos/libdruntime/core/sys/posix/ucontext.d
@@ -23,6 +23,10 @@  extern (C):
 nothrow:
 @nogc:
 
+version (MIPS32)  version = MIPS_Any;
+version (MIPS64)  version = MIPS_Any;
+version (PPC)     version = PPC_Any;
+version (PPC64)   version = PPC_Any;
 version (RISCV32) version = RISCV_Any;
 version (RISCV64) version = RISCV_Any;
 version (S390)    version = IBMZ_Any;
@@ -770,6 +774,139 @@  version (CRuntime_Glibc)
     else
         static assert(0, "unimplemented");
 }
+else version (CRuntime_Musl)
+{
+    version (AArch64)
+    {
+        struct mcontext_t
+        {
+            real[18+256] __regs;
+        }
+
+        struct ucontext_t
+        {
+            c_ulong     uc_flags;
+            ucontext_t* uc_link;
+            stack_t     uc_stack;
+            sigset_t    uc_sigmask;
+            mcontext_t  uc_mcontext;
+        }
+    }
+    else version (ARM)
+    {
+        struct mcontext_t
+        {
+            c_ulong[21] __regs;
+        }
+
+        struct ucontext_t
+        {
+            c_ulong     uc_flags;
+            ucontext_t* uc_link;
+            stack_t     uc_stack;
+            mcontext_t  uc_mcontext;
+            sigset_t    uc_sigmask;
+            ulong[64]   uc_regspace;
+        }
+    }
+    else version (IBMZ_Any)
+    {
+        struct mcontext_t
+        {
+            c_ulong[18] __regs1;
+            uint[18]    __regs2;
+            double[16]  __regs3;
+        }
+
+        struct ucontext_t
+        {
+            c_ulong     uc_flags;
+            ucontext_t* uc_link;
+            stack_t     uc_stack;
+            mcontext_t  uc_mcontext;
+            sigset_t    uc_sigmask;
+        }
+    }
+    else version (MIPS_Any)
+    {
+        version (MIPS_N32)
+        {
+            struct mcontext_t
+            {
+                ulong[32]  __mc1;
+                double[32] __mc2;
+                ulong[9]   __mc3;
+                uint[4]    __mc4;
+            }
+        }
+        else version (MIPS64)
+        {
+            struct mcontext_t
+            {
+                ulong[32]  __mc1;
+                double[32] __mc2;
+                ulong[9]   __mc3;
+                uint[4]    __mc4;
+            }
+        }
+        else
+        {
+            struct mcontext_t
+            {
+                uint[2]    __mc1;
+                ulong[65]  __mc2;
+                uint[5]    __mc3;
+                ulong[2]   __mc4;
+                uint[6]    __mc5;
+            }
+        }
+
+        struct ucontext_t
+        {
+            c_ulong     uc_flags;
+            ucontext_t* uc_link;
+            stack_t     uc_stack;
+            mcontext_t  uc_mcontext;
+            sigset_t    uc_sigmask;
+        }
+    }
+    else version (X86)
+    {
+        struct mcontext_t
+        {
+            uint[22] __space;
+        }
+
+        struct ucontext_t
+        {
+            c_ulong     uc_flags;
+            ucontext_t* uc_link;
+            stack_t     uc_stack;
+            mcontext_t  uc_mcontext;
+            sigset_t    uc_sigmask;
+            c_ulong[28] __fpregs_mem;
+        }
+    }
+    else version (X86_64)
+    {
+        struct mcontext_t
+        {
+            ulong[32] __space;
+        }
+
+        struct ucontext_t
+        {
+            c_ulong     uc_flags;
+            ucontext_t* uc_link;
+            stack_t     uc_stack;
+            mcontext_t  uc_mcontext;
+            sigset_t    uc_sigmask;
+            ulong[64]   __fpregs_mem;
+        }
+    }
+    else
+        static assert(0, "unimplemented");
+}
 else version (FreeBSD)
 {
     // <machine/ucontext.h>
@@ -897,6 +1034,26 @@  else version (FreeBSD)
             ulong[8]        mc_spare;
         }
     }
+    else version (PPC_Any)
+    {
+        alias size_t __register_t;
+        alias uint   __uint32_t;
+        alias ulong  __uint64_t;
+
+        struct mcontext_t {
+            int     mc_vers;
+            int     mc_flags;
+            enum _MC_FP_VALID = 0x01;
+            enum _MC_AV_VALID = 0x02;
+            int     mc_onstack;
+            int     mc_len;
+            __uint64_t[32 * 2]  mc_avec;
+            __uint32_t[2]       mc_av;
+            __register_t[42]    mc_frame;
+            __uint64_t[33]      mc_fpreg;
+            __uint64_t[32]      mc_vsxfpreg;
+        }
+    }
 
     // <ucontext.h>
     enum UCF_SWAPPED = 0x00000001;
@@ -914,44 +1071,57 @@  else version (FreeBSD)
 }
 else version (NetBSD)
 {
-
     version (X86_64)
     {
-      enum { NGREG = 26 };
-      alias __greg_t = ulong;
-      alias __gregset_t = __greg_t[NGREG];
-      alias __fpregset_t = align(8)ubyte[512];
+        private
+        {
+            enum _NGREG = 26;
+            alias __greg_t = c_ulong;
+            alias __gregset_t = __greg_t[_NGREG];
+            alias __fpregset_t = align(8) ubyte[512];
+        }
 
-      struct mcontext_t {
-        __gregset_t     __gregs;
-        __greg_t        _mc_tlsbase;
-        __fpregset_t    __fpregs;
-      }
+        struct mcontext_t
+        {
+            __gregset_t  __gregs;
+            __greg_t     _mc_tlsbase;
+            __fpregset_t __fpregs;
+        }
     }
     else version (X86)
     {
-      enum { NGREG = 19 };
-      alias __greg_t = ulong;
-      alias __gregset_t = __greg_t[_NGREG];
-      struct __fpregset_t{
-        union __fp_reg_set{
-                struct __fpchip_state{
-                        int[27]     __fp_state; /* Environment and registers */
-                } ;       /* x87 regs in fsave format */
-                struct __fp_xmm_state{
+        private
+        {
+            enum _NGREG = 19;
+            alias __greg_t = int;
+            alias __gregset_t = __greg_t[_NGREG];
+            struct __fpregset_t
+            {
+                union fp_reg_set_t
+                {
+                    struct fpchip_state_t
+                    {
+                        int[27] __fp_state;
+                    }
+                    struct fp_xmm_state_t
+                    {
                         ubyte[512]    __fp_xmm;
-                } ;       /* x87 and xmm regs in fxsave format */
-                int[128]     __fp_fpregs;
-        };
-        __fpregset_t __fp_reg_set;
-        int[33]     __fp_pad;                   /* Historic padding */
-      };
+                    }
+                    fpchip_state_t __fpchip_state;
+                    fp_xmm_state_t __fp_xmm_state;
+                    int[128]     __fp_fpregs;
+                }
+                fp_reg_set_t __fp_reg_set;
+                int[33]     __fp_pad;
+            }
+        }
 
-      struct mcontext_t {
-        __gregset_t     __gregs;
-        __fpregset_t    __fpregs;
-        __greg_t        _mc_tlsbase;
-      }
+        struct mcontext_t
+        {
+            __gregset_t     __gregs;
+            __fpregset_t    __fpregs;
+            __greg_t        _mc_tlsbase;
+        }
     }
 
     struct ucontext_t
@@ -965,7 +1135,6 @@  else version (NetBSD)
                 long            __uc_pad[_UC_MACHINE_PAD];
         #endif
         +/
-
     }
 }
 else version (OpenBSD)
diff --git a/libphobos/libdruntime/core/sys/posix/unistd.d b/libphobos/libdruntime/core/sys/posix/unistd.d
index 04de7764390..6e035e54502 100644
--- a/libphobos/libdruntime/core/sys/posix/unistd.d
+++ b/libphobos/libdruntime/core/sys/posix/unistd.d
@@ -2403,7 +2403,7 @@  else version (OpenBSD)
 {
     char*      crypt(in char*, in char*);
     //char*      ctermid(char*);
-    //void       encrypt(ref char[64], int) @trusted;
+    void       encrypt(ref char[64], int) @trusted;
     int        fchdir(int) @trusted;
     c_long     gethostid() @trusted;
     pid_t      getpgid(pid_t) @trusted;
diff --git a/libphobos/libdruntime/core/sys/windows/winnt.d b/libphobos/libdruntime/core/sys/windows/winnt.d
index abb65f87a4d..f378a17943d 100644
--- a/libphobos/libdruntime/core/sys/windows/winnt.d
+++ b/libphobos/libdruntime/core/sys/windows/winnt.d
@@ -49,6 +49,9 @@  alias void*  PVOID64;
 alias const(char)*  PCCH, LPCCH, PCSTR, LPCSTR;
 alias const(wchar)* LPCWCH, PCWCH, LPCWSTR, PCWSTR;
 
+alias PSTR* PZPSTR;
+alias PWSTR* PZPWSTR;
+
 version (Unicode) {
     alias WCHAR TCHAR, _TCHAR;
 } else {