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| author | Joseph Myers <joseph@codesourcery.com> | 2019-08-13 23:04:38 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2019-08-13 23:04:38 +0000 |
| commit | c3ce62cc0bd6e8a33629e2aabb7783a322e9189c (patch) | |
| tree | cbad12f52e7a0d589b2b1628a39e5c8a7e0ac756 /bits/libc-header-start.h | |
| parent | 5a3afa9738f3dbbaf8c0a35665318c1af782111b (diff) | |
| download | glibc-c3ce62cc0bd6e8a33629e2aabb7783a322e9189c.tar.gz glibc-c3ce62cc0bd6e8a33629e2aabb7783a322e9189c.tar.xz glibc-c3ce62cc0bd6e8a33629e2aabb7783a322e9189c.zip | |
Declare some TS 18661-4 interfaces for C2X.
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.
Diffstat (limited to 'bits/libc-header-start.h')
| -rw-r--r-- | bits/libc-header-start.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/bits/libc-header-start.h b/bits/libc-header-start.h index f2acc5333e..2c7c6e00e0 100644 --- a/bits/libc-header-start.h +++ b/bits/libc-header-start.h @@ -60,13 +60,21 @@ #endif /* ISO/IEC TS 18661-4:2015 defines the - __STDC_WANT_IEC_60559_FUNCS_EXT__ macro. */ + __STDC_WANT_IEC_60559_FUNCS_EXT__ macro. Other than the reduction + functions, the symbols from this TS are enabled unconditionally in + C2X. */ #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_C2X +#if __GLIBC_USE (IEC_60559_FUNCS_EXT) || __GLIBC_USE (ISOC2X) +# define __GLIBC_USE_IEC_60559_FUNCS_EXT_C2X 1 +#else +# define __GLIBC_USE_IEC_60559_FUNCS_EXT_C2X 0 +#endif /* ISO/IEC TS 18661-3:2015 defines the __STDC_WANT_IEC_60559_TYPES_EXT__ macro. */ |