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https://github.com/macports/macports-legacy-support

MacPorts support for missing functions in legacy macOS versions
https://github.com/macports/macports-legacy-support

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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 functions for the given OS.

 - libMacportsLegacySupport.dylib  - A dynamic library with the missing 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](https://github.com/macports)

add the `legacysupport` PortGroup to the Portfile. This will add the

required include paths and libraries to allow the library to do it's

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

    Wraps copyfile_state_get to support COPYFILE_STATE_COPIED

    OSX10.5

  

  

    dirent.h

    Adds fdopendir function.

    OSX10.9

  

  

    os/lock.h

    Adds os_unfair_lock_lock, os_unfair_lock_trylock, and os_unfair_lock_unlock functions

    OSX10.11

  

  

    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

  

  

    stdio.h

    Adds dprintf, getline, getdelim,

        open_memstream, and fmemopen functions

    OSX10.6, OSX10.12 (open_memstream)

  

  

    stdlib.h

    Adds posix_memalign functional replacement, and wraps realpath

        to accept a NULL buffer argument

    OSX10.5

  

  

    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,ffsl(OSX10.4) and flsll,ffsll(macOS10.8) functions

    OSX10.4(8)

  

  

    time.h

    Adds functions clock_gettime(macOS10.11) and timespec_get(macOS10.14). Defines TIME_UTC (macOS10.14). 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)

    OSX10.4(11,14)

  

  

    wchar.h

    Adds wcsdup, wcsnlen, wcpcpy,

        wcpncpy, wcscasecmp, and wcsncasecmp

        functions

    OSX10.6

  

  

    mach/machine.h

    Adds missing machine definitions

    OSX10.13

  

  

    net/if.h

    Adds include sys/socket.h, expected on current macOS systems

    OSX10.8

  

  

    xlocale/_wchar.h

    Adds wcscasecmp_l, wcsncasecmp_l functions

    OSX10.6

  

  

    sys/aio.h

    Adjusts includes and defines to match SDK 10.5+

    OSX10.4

  

  

    sys/fcntl.h

    Adds missing O_CLOEXEC, AT_FDCWD, AT_EACCESS,

        AT_SYMLINK_NOFOLLOW, AT_SYMLINK_FOLLOW, and

        AT_REMOVEDIR definitions

    as required (?)

  

  

    Adds openat function

    OSX10.9

  

  

    sys/fsgetpath.h

    Adds missing utimensat, fsgetpath and setattrlistat functions

    OSX10.12

  

  

    sys/mman.h

    Adds missing MAP_ANONYMOUS definition

    OSX10.10

  

  

    sys/queue.h

    Adds STAILQ_FOREACH macro

    OSX10.4

  

  

    sys/stdio.h

    Adds renameat function

    OSX10.9

  

  

    sys/stat.h

    Adds fchmodat, fstatat, fstatat64 (if required, and on 10.5+),

        and mkdirat functions

    OSX10.9

  

  

    Adds lchmod function

    OSX10.4

  

  

    sys/random.h

    Adds getentropy function

    OSX10.11

  

  

    sys/socket.h

    Corrects CMSG_DATA definition

    OSX10.5

  

  

    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

  

  

    CoreFoundation/CoreFoundation.h

    Adds CFPropertyListCreateWithStream function

    OSX10.5

  

  

    OpenGL/gliDispatch.h

    Wraps gliDispatch.h to prevent including

        glext.h and thereby match behaviour of newer systems.

    OSX10.6

  

  

    TargetConditionals.h

    Adds definitions for TARGET_CPU_ARM, TARGET_CPU_ARM64,

        TARGET_OS_SIMULATOR, TARGET_OS_IOS, TARGET_OS_TV,

        TARGET_OS_WATCH and TARGET_OS_OSX if needed.

    OSX10.10

  

  

    -

    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

  



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