MacPorts Support for Legacy OSX Versions

[cave_canem0]

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, and getdelim functions OSX10.6 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 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/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/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