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authorPaul Cercueil <paul@crapouillou.net>2024-02-10 20:29:30 +0100
committerWaldemar Brodkorb <wbx@openadk.org>2024-02-18 05:56:22 +0100
commit750a3fc91dec0e522b5fac57a75a9fe0047648bf (patch)
treeb797e847e6b99234c6a09a4e2c28696315372a0b /libuargp/argp-fs-xinl.c
parent5649ddd9a44e176d5b8cccb2db3c4d3da2b6288f (diff)
features.h: Rework _DEFAULT_SOURCE
The (glibc) documentation for _DEFAULT_SOURCE states: The "default" definitions comprise those required by POSIX.1-2008 and ISO C99, as well as various definitions originally derived from BSD and System V. On glibc 2.19 and earlier, these defaults were approximately equivalent to explicitly defining the following: cc -D_BSD_SOURCE -D_SVID_SOURCE -D_POSIX_C_SOURCE=200809 It also states that _BSD_SOURCE and _SVID_SOURCE are deprecated, and have the same effect as setting _DEFAULT_SOURCE. Therefore, when any of _BSD_SOURCE, _SVID_SOURCE or _DEFAULT_SOURCE is set, the three macros should be set, and POSIX 2008.09 compatibility should be enabled. Signed-off-by: Paul Cercueil <paul@crapouillou.net>
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