mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 14:00:30 +00:00
42cc619dfb
WG14 decided to use the name C23 as the informal name of the next revision of the C standard (notwithstanding the publication date in 2024). Update references to C2X in glibc to use the C23 name. This is intended to update everything *except* where it involves renaming files (the changes involving renaming tests are intended to be done separately). In the case of the _ISOC2X_SOURCE feature test macro - the only user-visible interface involved - support for that macro is kept for backwards compatibility, while adding _ISOC23_SOURCE. Tested for x86_64.
111 lines
4.2 KiB
C
111 lines
4.2 KiB
C
/* Handle feature test macros at the start of a header.
|
|
Copyright (C) 2016-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* This header is internal to glibc and should not be included outside
|
|
of glibc headers. Headers including it must define
|
|
__GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION first. This header
|
|
cannot have multiple include guards because ISO C feature test
|
|
macros depend on the definition of the macro when an affected
|
|
header is included, not when the first system header is
|
|
included. */
|
|
|
|
#ifndef __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
|
|
# error "Never include <bits/libc-header-start.h> directly."
|
|
#endif
|
|
|
|
#undef __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
|
|
|
|
#include <features.h>
|
|
|
|
/* ISO/IEC TR 24731-2:2010 defines the __STDC_WANT_LIB_EXT2__
|
|
macro. */
|
|
#undef __GLIBC_USE_LIB_EXT2
|
|
#if (defined __USE_GNU \
|
|
|| (defined __STDC_WANT_LIB_EXT2__ && __STDC_WANT_LIB_EXT2__ > 0))
|
|
# define __GLIBC_USE_LIB_EXT2 1
|
|
#else
|
|
# define __GLIBC_USE_LIB_EXT2 0
|
|
#endif
|
|
|
|
/* ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__
|
|
macro. Most but not all symbols enabled by that macro in TS
|
|
18661-1 are enabled unconditionally in C23. In C23, the symbols in
|
|
Annex F still require a new feature test macro
|
|
__STDC_WANT_IEC_60559_EXT__ instead (C23 does not define
|
|
__STDC_WANT_IEC_60559_BFP_EXT__), while a few features from TS
|
|
18661-1 are not included in C23 (and thus should depend on
|
|
__STDC_WANT_IEC_60559_BFP_EXT__ even when C23 features are
|
|
enabled).
|
|
|
|
__GLIBC_USE (IEC_60559_BFP_EXT) controls those features from TS
|
|
18661-1 not included in C23.
|
|
|
|
__GLIBC_USE (IEC_60559_BFP_EXT_C23) controls those features from TS
|
|
18661-1 that are also included in C23 (with no feature test macro
|
|
required in C23).
|
|
|
|
__GLIBC_USE (IEC_60559_EXT) controls those features from TS 18661-1
|
|
that are included in C23 but conditional on
|
|
__STDC_WANT_IEC_60559_EXT__. (There are currently no features
|
|
conditional on __STDC_WANT_IEC_60559_EXT__ that are not in TS
|
|
18661-1.) */
|
|
#undef __GLIBC_USE_IEC_60559_BFP_EXT
|
|
#if defined __USE_GNU || defined __STDC_WANT_IEC_60559_BFP_EXT__
|
|
# define __GLIBC_USE_IEC_60559_BFP_EXT 1
|
|
#else
|
|
# define __GLIBC_USE_IEC_60559_BFP_EXT 0
|
|
#endif
|
|
#undef __GLIBC_USE_IEC_60559_BFP_EXT_C23
|
|
#if __GLIBC_USE (IEC_60559_BFP_EXT) || __GLIBC_USE (ISOC23)
|
|
# define __GLIBC_USE_IEC_60559_BFP_EXT_C23 1
|
|
#else
|
|
# define __GLIBC_USE_IEC_60559_BFP_EXT_C23 0
|
|
#endif
|
|
#undef __GLIBC_USE_IEC_60559_EXT
|
|
#if __GLIBC_USE (IEC_60559_BFP_EXT) || defined __STDC_WANT_IEC_60559_EXT__
|
|
# define __GLIBC_USE_IEC_60559_EXT 1
|
|
#else
|
|
# define __GLIBC_USE_IEC_60559_EXT 0
|
|
#endif
|
|
|
|
/* ISO/IEC TS 18661-4:2015 defines the
|
|
__STDC_WANT_IEC_60559_FUNCS_EXT__ macro. Other than the reduction
|
|
functions, the symbols from this TS are enabled unconditionally in
|
|
C23. */
|
|
#undef __GLIBC_USE_IEC_60559_FUNCS_EXT
|
|
#if defined __USE_GNU || defined __STDC_WANT_IEC_60559_FUNCS_EXT__
|
|
# define __GLIBC_USE_IEC_60559_FUNCS_EXT 1
|
|
#else
|
|
# define __GLIBC_USE_IEC_60559_FUNCS_EXT 0
|
|
#endif
|
|
#undef __GLIBC_USE_IEC_60559_FUNCS_EXT_C23
|
|
#if __GLIBC_USE (IEC_60559_FUNCS_EXT) || __GLIBC_USE (ISOC23)
|
|
# define __GLIBC_USE_IEC_60559_FUNCS_EXT_C23 1
|
|
#else
|
|
# define __GLIBC_USE_IEC_60559_FUNCS_EXT_C23 0
|
|
#endif
|
|
|
|
/* ISO/IEC TS 18661-3:2015 defines the
|
|
__STDC_WANT_IEC_60559_TYPES_EXT__ macro. */
|
|
#undef __GLIBC_USE_IEC_60559_TYPES_EXT
|
|
#if defined __USE_GNU || defined __STDC_WANT_IEC_60559_TYPES_EXT__
|
|
# define __GLIBC_USE_IEC_60559_TYPES_EXT 1
|
|
#else
|
|
# define __GLIBC_USE_IEC_60559_TYPES_EXT 0
|
|
#endif
|