macports/macports-legacy-support

MacPorts support for missing functions in legacy macOS versions

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README

MacPorts Support for Legacy OSX Versions

Installs wrapper headers and library functions that add common functions missing in various older OSX releases to bring them approximately up to current expected standards.

Three different libraries are provided

libMacportsLegacySupport.a - A static library with the missing or enhanced functions for the given OS.
libMacportsLegacySupport.dylib - A dynamic library with the missing or enhanced functions for the given OS.
libMacportsLegacySystem.B.dylib - Similar to libMacportsLegacySupport.dylib but in addition re-exports the symbols from libSystem.B.dylib.

To use this library within MacPorts add the legacysupport PortGroup to the Portfile. This will add the required include paths and libraries to allow the library to do its magic with most build systems.

Wrapped headers and replaced functions are:

Header File	Feature	Max Version Needing Feature
`assert.h`	Adds C11 `static_assert` definition	OSX10.10
`cmath`	Adds the same functions as those provided by the herein `math.h`, in namespace `std::`.	see `math.h`
`copyfile.h`	Completely redone to provide 10.6 version	OSX10.5
`dirent.h`	Adds `fdopendir` function.	OSX10.9
`fcntl.h`	Fixes `fcntl(...,F_GETPATH,...)` bug on 10.4 ppc64.	OSX10.4 ppc64
`math.h`	Adds declaration of various `long long` methods (OSX10.6) and `__sincos` (macOS10.8)	OSX10.6(8), GCC 8
`netdb.h`	Adds declaration of `AI_NUMERICSERV`	OSX10.5
`pthread.h`	Adds `PTHREAD_RWLOCK_INITIALIZER`	OSX10.4
	Adds `pthread_setname_np` function	OSX10.5
	Adds `pthread_chdir_np` and `pthread_fchdir_np` functions	OSX10.11
`stdio.h`	Adds `dprintf`, `vdprintf`, `getline`, and `getdelim` functions	OSX10.6
	Adds `open_memstream` and `fmemopen` functions	OSX10.12
	Adds include of `sys/stdio.h`	OSX10.9
`stdlib.h`	Adds `posix_memalign` functional replacement	OSX10.5
	Wraps `realpath` to accept a `NULL` buffer argument	OSX10.5
	Fixes non-POSIX `realpath` in 10.6	OSX10.6
	Adds `arc4random_uniform` and `arc4random_buf` functions	OSX10.6
`string.h`	Adds `stpncpy`, `strnlen`, `strndup` and `memmem` functions	OSX10.6
`strings.h`	Adds `fls`, `flsl`, and `ffsl` functions	OSX10.4
`strings.h`	Adds `flsll` and `ffsll` functions	OSX10.8
`time.h`	Declares `asctime_r`, `ctime_r`, `gmtime_r`, and `localtime_r` functions that are otherwise hidden in the presence of `_ANSI_SOURCE`, `_POSIX_C_SOURCE`, or `_XOPEN_SOURCE`	OSX10.4
	Adds functions `clock_gettime`, `clock_gettime_nsec_np` and `clock_settime`	OSX10.11
	Adds function `timespec_get`	OSX10.14
`ucontext.h` subincludes	Adds definitions and aliases for 10.5+ context names to 10.4	OSX10.4
`unistd.h`	Adds `fgetattrlist` and `fsetattrlist` functions	OSX10.5
`unistd.h`	Fixes bug in `setattrlist` function	OSX10.7
`wchar.h`	Adds `wcsdup`, `wcsnlen`, `wcpcpy`, `wcpncpy`, `wcscasecmp`, and `wcsncasecmp` functions	OSX10.6
`Xplugin.h`	Adds missing `Xplugin.h` to 10.4	OSX10.4
`mach/mach_time.h`	Adds function `mach_approximate_time`	OSX10.9
`mach/mach_time.h`	Adds functions `mach_continuous_time` and `mach_continuous_approximate_time`	OSX10.11
`mach/machine.h`	Adds missing machine definitions	OSX10.13
`net/if.h`	Adds include `sys/socket.h`, expected on current macOS systems	OSX10.8
`net/if_utun.h`	Added when missing	OSX10.5
`os/lock.h`	Adds `os_unfair_lock_lock`, `os_unfair_lock_trylock`, and `os_unfair_lock_unlock` functions	OSX10.11
`sys/aio.h`	Adjusts includes and defines to match SDK 10.5+	OSX10.4
`sys/attr.h`	Adds missing `VOL_CAP_INT_CLONE` definition	OSX10.11
`sys/clonefile.h`	Adds `clonefile`, `clonefileat`, and `fclonefileat` functions	OSX10.11
`sys/fcntl.h`	Adds missing `O_CLOEXEC`, `AT_FDCWD`, `AT_EACCESS`, `AT_SYMLINK_NOFOLLOW`, `AT_SYMLINK_FOLLOW`, and `AT_REMOVEDIR` definitions	as required (?)
`sys/fcntl.h`	Adds `openat` function	OSX10.9
`sys/fsgetpath.h`	Adds `fsgetpath` function	OSX10.12
`sys/mman.h`	Adds missing `MAP_ANONYMOUS` definition	OSX10.10
`sys/queue.h`	Adds `SLIST_HEAD_INITIALIZER` macro	OSX10.4
	Adds `SLIST_REMOVE_AFTER` macro	OSX10.6
	Adds `STAILQ_FOREACH` macro	OSX10.4
`sys/random.h`	Adds `getentropy` function	OSX10.11
`sys/socket.h`	Corrects `CMSG_DATA` definition	OSX10.5
`sys/stat.h`	Adds `fchmodat`, `fstatat`, and `mkdirat` functions	OSX10.9
	Adds `setattrlistat` and `utimensat` functions	OSX10.12
	Adds `lchmod` function	OSX10.4
	Adds limited `stat64` support	OSX10.4
	Fixes `stat` bugs on 10.4 ppc64	OSX10.4 ppc64
`sys/stdio.h`	Adds `renameat` function	OSX10.9
`sys/time.h`	Adds `lutimes` function	OSX10.4
`sys/types.h`	Adds definitions for `u_char`, `u_short`, `u_int`, `u_long`, `ushort`, and `uint` types that can be exposed via `_DARWIN_C_SOURCE`	OSX10.4
`sys/unistd.h`	Adds `getattrlistat`, `readlinkat`, `faccessat`, `fchownat`, `linkat`, `symlinkat`, and `unlinkat` functions.	OSX10.9
	Wraps `sysconf` to support `_SC_NPROCESSORS_CONF` and `_SC_NPROCESSORS_ONLN`	OSX10.4
	Wraps `sysconf` to support `_SC_PHYS_PAGES`	OSX10.10
`uuid/uuid.h`	Adds typedef of `uuid_string_t`	OSX10.5
`xlocale/_wchar.h`	Adds `wcscasecmp_l`, `wcsncasecmp_l` functions	OSX10.6
`CoreFoundation/CoreFoundation.h`	Adds `CFPropertyListCreateWithStream` function	OSX10.5
`CoreFoundation/CFString.h`	Adds `CFStringCreateWithBytesNoCopy` prototype	OSX10.4
`OpenGL/gl.h`, `AGL/gl.h`	Updates 10.4 `gl.h` to make types match behaviour of newer systems.	OSX10.4
`OpenGL/gliDispatch.h`, `AGL/gliDispatch.h`	Wraps `gliDispatch.h` to prevent including `glext.h` and thereby match behaviour of newer systems.	OSX10.6
`TargetConditionals.h`	Adds definitions for all TARGET_* definitions as listed in 15.x SDK, if needed.	???
`-`	Adds `__bzero` library symbol	OSX10.5
`-`	Adds `_dirfd` library symbol	OSX10.7
`-`	Adds `_fstatat$INODE64` library symbol	OSX10.9
`-`	Provides a workaround for bug in `pthread_get_stacksize_np`	OSX10.4, OSX10.5, OSX10.9, OSX10.10
`-`	Fixes boottime bug in 64-bit `sysctl()` and `sysctlbyname()`	OSX10.5
`-`	Fixes ppc64 signal handling in 10.4	OSX10.4

For information on building this library outside MacPorts, see BUILDING.txt.

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