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| author | Lenard Mollenkopf <glibc@lenardmollenkopf.de> | 2024-10-22 15:17:54 +0200 |
|---|---|---|
| committer | Joseph Myers <josmyers@redhat.com> | 2024-11-04 22:40:55 +0000 |
| commit | e442e8376dcb14c904523c78994157cb5b502ff1 (patch) | |
| tree | f14f7bbecd2c80b7614022a048d371ccc62ca38d /include | |
| parent | 2843e78b30da0aa743fdfb0ac61435c925182c04 (diff) | |
| download | glibc-e442e8376dcb14c904523c78994157cb5b502ff1.tar.xz glibc-e442e8376dcb14c904523c78994157cb5b502ff1.zip | |
Add feature test macro _ISOC2Y_SOURCE
This patch starts preparation for C2Y support in glibc headers by
adding a feature test macro _ISOC2Y_SOURCE and corresponding
__GLIBC_USE (ISOC2Y). (I mostly copied the work of Joseph Myers
for C2X). As with other such macros, C2Y features are also
enabled by compiling for a standard newer than C23, or by using
_GNU_SOURCE.
This patch does not itself enable anything new in the headers for C2Y;
that is to be done in followup patches. (For example an implementation
of WG14 N3349.)
Once C2Y becomes an actual standard we'll presumably move to using the
actual year in the feature test macro and __GLIBC_USE, with some
period when both macro spellings are accepted, as was done with
_ISOC2X_SOURCE.
Tested for x86_64.
Signed-off-by: Lenard Mollenkopf <glibc@lenardmollenkopf.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/features.h | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/include/features.h b/include/features.h index 093de6f44c..0a8aa7c4f9 100644 --- a/include/features.h +++ b/include/features.h @@ -26,6 +26,7 @@ _ISOC11_SOURCE Extensions to ISO C99 from ISO C11. _ISOC23_SOURCE Extensions to ISO C99 from ISO C23. _ISOC2X_SOURCE Old name for _ISOC23_SOURCE. + _ISOC2Y_SOURCE Extensions to ISO C23 from ISO C2Y. __STDC_WANT_LIB_EXT2__ Extensions to ISO C99 from TR 27431-2:2010. __STDC_WANT_IEC_60559_BFP_EXT__ @@ -150,6 +151,7 @@ #undef __USE_FORTIFY_LEVEL #undef __KERNEL_STRICT_NAMES #undef __GLIBC_USE_ISOC23 +#undef __GLIBC_USE_ISOC2Y #undef __GLIBC_USE_DEPRECATED_GETS #undef __GLIBC_USE_DEPRECATED_SCANF #undef __GLIBC_USE_C23_STRTOL @@ -216,6 +218,8 @@ # define _ISOC11_SOURCE 1 # undef _ISOC23_SOURCE # define _ISOC23_SOURCE 1 +# undef _ISOC2Y_SOURCE +# define _ISOC2Y_SOURCE 1 # undef _POSIX_SOURCE # define _POSIX_SOURCE 1 # undef _POSIX_C_SOURCE @@ -239,15 +243,23 @@ #if (defined _DEFAULT_SOURCE \ || (!defined __STRICT_ANSI__ \ && !defined _ISOC99_SOURCE && !defined _ISOC11_SOURCE \ - && !defined _ISOC23_SOURCE \ + && !defined _ISOC23_SOURCE && !defined _ISOC2Y_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 C2Y extension. */ +#if (defined _ISOC2Y_SOURCE \ + || (defined __STDC_VERSION__ && __STDC_VERSION__ > 202311L)) +# define __GLIBC_USE_ISOC2Y 1 +#else +# define __GLIBC_USE_ISOC2Y 0 +#endif + /* This is to enable the ISO C23 extension. */ -#if (defined _ISOC23_SOURCE \ +#if (defined _ISOC23_SOURCE || defined _ISOC2Y_SOURCE \ || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L)) # define __GLIBC_USE_ISOC23 1 #else @@ -255,21 +267,22 @@ #endif /* This is to enable the ISO C11 extension. */ -#if (defined _ISOC11_SOURCE || defined _ISOC23_SOURCE \ +#if (defined _ISOC11_SOURCE || defined _ISOC23_SOURCE \ + || defined _ISOC2Y_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 \ - || defined _ISOC23_SOURCE \ + || defined _ISOC23_SOURCE || defined _ISOC2Y_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 \ - || defined _ISOC23_SOURCE \ + || defined _ISOC23_SOURCE || defined _ISOC2Y_SOURCE \ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L)) # define __USE_ISOC95 1 #endif |