From c3ce62cc0bd6e8a33629e2aabb7783a322e9189c Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Tue, 13 Aug 2019 23:04:38 +0000 Subject: 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 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. --- math/bits/mathcalls.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'math/bits/mathcalls.h') diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h index 3d1dc07d98..47808a2915 100644 --- a/math/bits/mathcalls.h +++ b/math/bits/mathcalls.h @@ -109,7 +109,7 @@ __MATHCALL (log10,, (_Mdouble_ __x)); /* Break VALUE into integral and fractional parts. */ __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)) __nonnull ((2)); -#if __GLIBC_USE (IEC_60559_FUNCS_EXT) +#if __GLIBC_USE (IEC_60559_FUNCS_EXT_C2X) /* Compute exponent to base ten. */ __MATHCALL (exp10,, (_Mdouble_ __x)); #endif -- cgit 1.4.1