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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 /manual | |
| parent | 71b480444799983c2dc4f512671c47f78d99ac13 (diff) | |
| download | glibc-412cb261b0d66ef5251d7d1c8276b5c522d943b7.tar.gz glibc-412cb261b0d66ef5251d7d1c8276b5c522d943b7.tar.xz glibc-412cb261b0d66ef5251d7d1c8276b5c522d943b7.zip | |
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 'manual')
| -rw-r--r-- | manual/creature.texi | 9 | ||||
| -rw-r--r-- | manual/math.texi | 9 |
2 files changed, 14 insertions, 4 deletions
diff --git a/manual/creature.texi b/manual/creature.texi index 61b17ce22b..257f8718b1 100644 --- a/manual/creature.texi +++ b/manual/creature.texi @@ -183,6 +183,15 @@ are enabled. Only some of the features from this TS are supported by @end defvr @comment (none) +@comment ISO +@defvr Macro __STDC_WANT_IEC_60559_FUNCS_EXT__ +If you define this macro, features from ISO/IEC TS 18661-4:2015 +(Floating-point extensions for C: Supplementary functions) are +enabled. Only some of the features from this TS are supported by +@theglibc{}. +@end defvr + +@comment (none) @comment GNU @defvr Macro _GNU_SOURCE If you define this macro, everything is included: @w{ISO C89}, @w{ISO diff --git a/manual/math.texi b/manual/math.texi index 5c9f7b9f1c..d689820c6c 100644 --- a/manual/math.texi +++ b/manual/math.texi @@ -480,13 +480,13 @@ Mathematically, @code{exp2 (x)} is the same as @code{exp (x * log (2))}. @end deftypefun @comment math.h -@comment GNU +@comment ISO @deftypefun double exp10 (double @var{x}) @comment math.h -@comment GNU +@comment ISO @deftypefunx float exp10f (float @var{x}) @comment math.h -@comment GNU +@comment ISO @deftypefunx {long double} exp10l (long double @var{x}) @comment math.h @comment GNU @@ -501,7 +501,8 @@ Mathematically, @code{exp2 (x)} is the same as @code{exp (x * log (2))}. These functions compute @code{10} raised to the power @var{x}. Mathematically, @code{exp10 (x)} is the same as @code{exp (x * log (10))}. -These functions are GNU extensions. The name @code{exp10} is +The @code{exp10} functions are from TS 18661-4:2015; the @code{pow10} +names are GNU extensions. The name @code{exp10} is preferred, since it is analogous to @code{exp} and @code{exp2}. @end deftypefun |