diff options
Diffstat (limited to 'bits')
| -rw-r--r-- | bits/libc-header-start.h | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/bits/libc-header-start.h b/bits/libc-header-start.h index 296e1cef9b..47f39105a2 100644 --- a/bits/libc-header-start.h +++ b/bits/libc-header-start.h @@ -44,8 +44,26 @@ /* ISO/IEC TS 18661-1:2014 defines the __STDC_WANT_IEC_60559_BFP_EXT__ macro. Most but not all symbols enabled by that macro in TS - 18661-1 are enabled unconditionally in C2X; the symbols in Annex F - still require that macro in C2X. */ + 18661-1 are enabled unconditionally in C2X. In C2X, the symbols in + Annex F still require a new feature test macro + __STDC_WANT_IEC_60559_EXT__ instead (C2X does not define + __STDC_WANT_IEC_60559_BFP_EXT__), while a few features from TS + 18661-1 are not included in C2X (and thus should depend on + __STDC_WANT_IEC_60559_BFP_EXT__ even when C2X features are + enabled). + + __GLIBC_USE (IEC_60559_BFP_EXT) controls those features from TS + 18661-1 not included in C2X. + + __GLIBC_USE (IEC_60559_BFP_EXT_C2X) controls those features from TS + 18661-1 that are also included in C2X (with no feature test macro + required in C2X). + + __GLIBC_USE (IEC_60559_EXT) controls those features from TS 18661-1 + that are included in C2X but conditional on + __STDC_WANT_IEC_60559_EXT__. (There are currently no features + conditional on __STDC_WANT_IEC_60559_EXT__ that are not in TS + 18661-1.) */ #undef __GLIBC_USE_IEC_60559_BFP_EXT #if defined __USE_GNU || defined __STDC_WANT_IEC_60559_BFP_EXT__ # define __GLIBC_USE_IEC_60559_BFP_EXT 1 @@ -58,6 +76,12 @@ #else # define __GLIBC_USE_IEC_60559_BFP_EXT_C2X 0 #endif +#undef __GLIBC_USE_IEC_60559_EXT +#if __GLIBC_USE (IEC_60559_BFP_EXT) || defined __STDC_WANT_IEC_60559_EXT__ +# define __GLIBC_USE_IEC_60559_EXT 1 +#else +# define __GLIBC_USE_IEC_60559_EXT 0 +#endif /* ISO/IEC TS 18661-4:2015 defines the __STDC_WANT_IEC_60559_FUNCS_EXT__ macro. Other than the reduction |