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c3ce62cc0b
C2X (current version in git, postdating the most recent public draft available as a PDF on the WG14 website) adds the interfaces from TS 18661-4, other than the reduction functions, as unconditionally required and visible in <math.h> for hosted implementations; the __STDC_WANT_IEC_60559_FUNCS_EXT__ macro is not included in C2X at all (as the reduction functions aren't included at all, expected to end up in a version of the TS updated to be relative to C2X). This patch updates the glibc headers accordingly, following the same pattern used for 18661-1 functions. As the only 18661-4 functions currently supported are the exp10 functions that have been in glibc for a very long time, this means that in fact __GLIBC_USE (IEC_60559_FUNCS_EXT) ends up being used only to determine the definition of __GLIBC_USE_IEC_60559_FUNCS_EXT_C2X, not yet in any headers other than bits/libc-header-start.h. (I hope to add the other 18661-4 functions to glibc at some point; the main complication is the current lack of MPFR support for many of these functions.) Tested for x86_64. * bits/libc-header-start.h (__GLIBC_USE_IEC_60559_FUNCS_EXT): Update comment. (__GLIBC_USE_IEC_60559_FUNCS_EXT_C2X): New macro. * bits/math-finite.h [__GLIBC_USE (IEC_60559_FUNCS_EXT)]: Change to [__GLIBC_USE (IEC_60559_FUNCS_EXT_C2X)]. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_FUNCS_EXT)]: Likewise.
87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
/* Handle feature test macros at the start of a header.
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Copyright (C) 2016-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* This header is internal to glibc and should not be included outside
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of glibc headers. Headers including it must define
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__GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION first. This header
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cannot have multiple include guards because ISO C feature test
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macros depend on the definition of the macro when an affected
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header is included, not when the first system header is
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included. */
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#ifndef __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
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# error "Never include <bits/libc-header-start.h> directly."
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#endif
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#undef __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
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#include <features.h>
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/* ISO/IEC TR 24731-2:2010 defines the __STDC_WANT_LIB_EXT2__
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macro. */
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#undef __GLIBC_USE_LIB_EXT2
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#if (defined __USE_GNU \
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|| (defined __STDC_WANT_LIB_EXT2__ && __STDC_WANT_LIB_EXT2__ > 0))
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# define __GLIBC_USE_LIB_EXT2 1
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#else
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# define __GLIBC_USE_LIB_EXT2 0
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#endif
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/* ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__
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macro. Most but not all symbols enabled by that macro in TS
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18661-1 are enabled unconditionally in C2X; the symbols in Annex F
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still require that macro in C2X. */
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#undef __GLIBC_USE_IEC_60559_BFP_EXT
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#if defined __USE_GNU || defined __STDC_WANT_IEC_60559_BFP_EXT__
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# define __GLIBC_USE_IEC_60559_BFP_EXT 1
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#else
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# define __GLIBC_USE_IEC_60559_BFP_EXT 0
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#endif
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#undef __GLIBC_USE_IEC_60559_BFP_EXT_C2X
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#if __GLIBC_USE (IEC_60559_BFP_EXT) || __GLIBC_USE (ISOC2X)
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# define __GLIBC_USE_IEC_60559_BFP_EXT_C2X 1
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#else
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# define __GLIBC_USE_IEC_60559_BFP_EXT_C2X 0
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#endif
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/* ISO/IEC TS 18661-4:2015 defines the
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__STDC_WANT_IEC_60559_FUNCS_EXT__ macro. Other than the reduction
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functions, the symbols from this TS are enabled unconditionally in
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C2X. */
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#undef __GLIBC_USE_IEC_60559_FUNCS_EXT
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#if defined __USE_GNU || defined __STDC_WANT_IEC_60559_FUNCS_EXT__
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# define __GLIBC_USE_IEC_60559_FUNCS_EXT 1
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#else
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# define __GLIBC_USE_IEC_60559_FUNCS_EXT 0
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#endif
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#undef __GLIBC_USE_IEC_60559_FUNCS_EXT_C2X
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#if __GLIBC_USE (IEC_60559_FUNCS_EXT) || __GLIBC_USE (ISOC2X)
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# define __GLIBC_USE_IEC_60559_FUNCS_EXT_C2X 1
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#else
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# define __GLIBC_USE_IEC_60559_FUNCS_EXT_C2X 0
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#endif
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/* ISO/IEC TS 18661-3:2015 defines the
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__STDC_WANT_IEC_60559_TYPES_EXT__ macro. */
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#undef __GLIBC_USE_IEC_60559_TYPES_EXT
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#if defined __USE_GNU || defined __STDC_WANT_IEC_60559_TYPES_EXT__
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# define __GLIBC_USE_IEC_60559_TYPES_EXT 1
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#else
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# define __GLIBC_USE_IEC_60559_TYPES_EXT 0
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#endif
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