diff options
Diffstat (limited to 'CONFORMANCE')
| -rw-r--r-- | CONFORMANCE | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/CONFORMANCE b/CONFORMANCE index 8275aba26c..b23318ee9d 100644 --- a/CONFORMANCE +++ b/CONFORMANCE @@ -134,13 +134,12 @@ Compiler limitations ==================== The macros __STDC_IEC_559__, __STDC_IEC_559_COMPLEX__ and -__STDC_ISO_10646__ are properly supposed to be defined by the -compiler, and to be constant throughout the translation unit (before -and after any library headers are included). However, they mainly -relate to library features, and the necessary magic has yet to be -implemented for GCC to predefine them to the correct values for the -library in use, so glibc defines them in <features.h>. Programs that -test them before including any standard headers may misbehave. +__STDC_ISO_10646__ are properly supposed to be constant throughout the +translation unit (before and after any library headers are included). +However, they mainly relate to library features, and GCC only knows to +preinclude <stdc-predef.h> to get their definitions in version 4.8 and +later. Programs that test them before including any standard headers +may misbehave with older compilers. GCC doesn't support the optional imaginary types. Nor does it understand the keyword _Complex before GCC 3.0. This has the |