diff options
| -rw-r--r-- | ChangeLog | 11 | ||||
| -rw-r--r-- | NEWS | 7 | ||||
| -rw-r--r-- | include/features.h | 21 | ||||
| -rw-r--r-- | manual/creature.texi | 7 |
4 files changed, 42 insertions, 4 deletions
@@ -1,3 +1,14 @@ +2019-08-13 Joseph Myers <joseph@codesourcery.com> + + * include/features.h (_ISOC2X_SOURCE): New feature test macro. + Undefine and define to 1 if [_GNU_SOURCE]. + (__GLIBC_USE_ISOC2X): New macro. Undefine and redefine depending + on [_ISOC2X_SOURCE] and [__STDC_VERSION__ > 201710L]. + (__USE_ISOC11): Also define to 1 if [_ISOC2X_SOURCE]. + (__USE_ISOC99): Likewise. + (__USE_ISOC95): Likewise. + * manual/creature.texi (_ISOC2X_SOURCE): Document. + 2019-08-13 Florian Weimer <fweimer@redhat.com> * login/getutid_r.c (__getutid_r): _HAVE_UT_ID and _HAVE_UT_TYPE @@ -9,7 +9,12 @@ Version 2.31 Major new features: - [Add new features here] +* The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to + enable features from the draft ISO C2X standard. Only some features from + this draft standard are supported by the GNU C Library, and as the draft + is under active development, the set of features enabled by this macro is + liable to change. Features from C2X are also enabled by _GNU_SOURCE, or + by compiling with "gcc -std=gnu2x". Deprecated and removed features, and other changes affecting compatibility: diff --git a/include/features.h b/include/features.h index bf47d881dd..8187539581 100644 --- a/include/features.h +++ b/include/features.h @@ -24,6 +24,7 @@ __STRICT_ANSI__ ISO Standard C. _ISOC99_SOURCE Extensions to ISO C89 from ISO C99. _ISOC11_SOURCE Extensions to ISO C99 from ISO C11. + _ISOC2X_SOURCE Extensions to ISO C99 from ISO C2X. __STDC_WANT_LIB_EXT2__ Extensions to ISO C99 from TR 27431-2:2010. __STDC_WANT_IEC_60559_BFP_EXT__ @@ -139,6 +140,7 @@ #undef __USE_GNU #undef __USE_FORTIFY_LEVEL #undef __KERNEL_STRICT_NAMES +#undef __GLIBC_USE_ISOC2X #undef __GLIBC_USE_DEPRECATED_GETS #undef __GLIBC_USE_DEPRECATED_SCANF @@ -195,6 +197,8 @@ # define _ISOC99_SOURCE 1 # undef _ISOC11_SOURCE # define _ISOC11_SOURCE 1 +# undef _ISOC2X_SOURCE +# define _ISOC2X_SOURCE 1 # undef _POSIX_SOURCE # define _POSIX_SOURCE 1 # undef _POSIX_C_SOURCE @@ -216,26 +220,37 @@ #if (defined _DEFAULT_SOURCE \ || (!defined __STRICT_ANSI__ \ && !defined _ISOC99_SOURCE && !defined _ISOC11_SOURCE \ + && !defined _ISOC2X_SOURCE \ && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE \ && !defined _XOPEN_SOURCE)) # undef _DEFAULT_SOURCE # define _DEFAULT_SOURCE 1 #endif +/* This is to enable the ISO C2X extension. */ +#if (defined _ISOC2X_SOURCE \ + || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L)) +# define __GLIBC_USE_ISOC2X 1 +#else +# define __GLIBC_USE_ISOC2X 0 +#endif + /* This is to enable the ISO C11 extension. */ -#if (defined _ISOC11_SOURCE \ +#if (defined _ISOC11_SOURCE || defined _ISOC2X_SOURCE \ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L)) # define __USE_ISOC11 1 #endif /* This is to enable the ISO C99 extension. */ -#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \ +#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \ + || defined _ISOC2X_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 _ISOC11_SOURCE \ +#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \ + || defined _ISOC2X_SOURCE \ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L)) # define __USE_ISOC95 1 #endif diff --git a/manual/creature.texi b/manual/creature.texi index 8876b2ab77..be5050468b 100644 --- a/manual/creature.texi +++ b/manual/creature.texi @@ -177,6 +177,13 @@ when the compiler uses an earlier language version. If this macro is defined, ISO C11 extensions to ISO C99 are included. @end defvr +@defvr Macro _ISOC2X_SOURCE +@standards{C2X, (none)} +If this macro is defined, ISO C2X extensions to ISO C11 are included. +Only some features from this draft standard are supported by +@theglibc{}. +@end defvr + @defvr Macro __STDC_WANT_LIB_EXT2__ @standards{ISO, (none)} If you define this macro to the value @code{1}, features from ISO/IEC |