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Support C11 __STDC_SOURCE__ and _ISOC11_SOURCE

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This commit is contained in:
Ulrich Drepper
2011-12-23 22:45:16 -05:00
parent a316c1f682
commit d78099052b
2 changed files with 15 additions and 6 deletions
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18
include/features.h
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@@ -25,6 +25,7 @@
__STRICT_ANSI__ ISO Standard C.
_ISOC99_SOURCE Extensions to ISO C89 from ISO C99.
_ISOC11_SOURCE Extensions to ISO C99 from ISO C11.
_POSIX_SOURCE IEEE Std 1003.1.
_POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
if >=199309L, add IEEE Std 1003.1b-1993;
@@ -57,6 +58,7 @@
These are defined by this file and are used by the
header files to decide what to declare or define:
__USE_ISOC11 Define ISO C11 things.
__USE_ISOC99 Define ISO C99 things.
__USE_ISOC95 Define ISO C90 AMD1 (C95) things.
__USE_POSIX Define IEEE Std 1003.1 things.
@@ -95,6 +97,7 @@
/* Undefine everything, so we get a clean slate. */
#undef __USE_ISOC11
#undef __USE_ISOC99
#undef __USE_ISOC95
#undef __USE_POSIX
@@ -158,6 +161,8 @@
# define _ISOC95_SOURCE 1
# undef _ISOC99_SOURCE
# define _ISOC99_SOURCE 1
# undef _ISOC11_SOURCE
# define _ISOC11_SOURCE 1
# undef _POSIX_SOURCE
# define _POSIX_SOURCE 1
# undef _POSIX_C_SOURCE
@@ -185,17 +190,18 @@
# define _SVID_SOURCE 1
#endif
/* This is to enable the ISO C99 extension. Also recognize the old macro
which was used prior to the standard acceptance. This macro will
eventually go away and the features enabled by default once the ISO C99
standard is widely adopted. */
#if (defined _ISOC99_SOURCE || defined _ISOC9X_SOURCE \
/* This is to enable the ISO C11 extension. */
#if (defined _ISOC11_SOURCE \
|| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L))
/* This is to enable the ISO C99 extension. */
#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \
|| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
# define __USE_ISOC99 1
#endif
/* This is to enable the ISO C90 Amendment 1:1995 extension. */
#if (defined _ISOC99_SOURCE || defined _ISOC9X_SOURCE \
#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \
|| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L))
# define __USE_ISOC95 1
#endif