mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-09 04:11:27 +08:00
412cb261b0
This patch implements support for the __STDC_WANT_IEC_60559_FUNCS_EXT__ feature test macro, following the __GLIBC_USE approach used for other ISO C feature test macros. Currently this only affects the exp10 functions (which glibc has had for a long time). Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * bits/libc-header-start.h (__GLIBC_USE_IEC_60559_FUNCS_EXT): New macro. * include/features.h (__STDC_WANT_IEC_60559_FUNCS_EXT__): Document. * manual/creature.texi (__STDC_WANT_IEC_60559_FUNCS_EXT__): Document macro. * manual/math.texi (exp10): Document as ISO from TS 18661-4:2015. (exp10f): Likewise. (exp10l): Likewise. * math/bits/mathcalls.h (exp10): Declare if [__GLIBC_USE (IEC_60559_FUNCS_EXT)], not [__USE_GNU].
62 lines
2.3 KiB
C
62 lines
2.3 KiB
C
/* Handle feature test macros at the start of a header.
|
|
Copyright (C) 2016 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
|
|
<http://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. */
|
|
#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
|
|
|
|
/* ISO/IEC TS 18661-4:2015 defines the
|
|
__STDC_WANT_IEC_60559_FUNCS_EXT__ macro. */
|
|
#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
|