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| author | Joseph Myers <joseph@codesourcery.com> | 2016-08-03 22:21:37 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2016-08-03 22:21:37 +0000 |
| commit | 412cb261b0d66ef5251d7d1c8276b5c522d943b7 (patch) | |
| tree | a1761d0c902d348f6a8c00c7a155dee2c3cd026d /math/bits | |
| parent | 71b480444799983c2dc4f512671c47f78d99ac13 (diff) | |
Support __STDC_WANT_IEC_60559_FUNCS_EXT__ feature test macro.
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].
Diffstat (limited to 'math/bits')
| -rw-r--r-- | math/bits/mathcalls.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h index e1c0521ae8..951a3d0090 100644 --- a/math/bits/mathcalls.h +++ b/math/bits/mathcalls.h @@ -115,9 +115,11 @@ __MATHCALL (log10,, (_Mdouble_ __x)); __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)) __nonnull ((2)); _Mdouble_END_NAMESPACE -#ifdef __USE_GNU -/* A function missing in all standards: compute exponent to base ten. */ +#if __GLIBC_USE (IEC_60559_FUNCS_EXT) +/* Compute exponent to base ten. */ __MATHCALL (exp10,, (_Mdouble_ __x)); +#endif +#ifdef __USE_GNU /* Another name occasionally used. */ __MATHCALL (pow10,, (_Mdouble_ __x)); #endif |