diff options
Diffstat (limited to 'CONFORMANCE')
| -rw-r--r-- | CONFORMANCE | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/CONFORMANCE b/CONFORMANCE index bfb8291..c968754 100644 --- a/CONFORMANCE +++ b/CONFORMANCE @@ -62,9 +62,11 @@ of the C standard (as indicated by __STDC_VERSION__): GCC options Standard version -ansi ISO/IEC 9899:1990 -std=c89 ISO/IEC 9899:1990 --std=iso9899:199409 ISO/IEC 9899:1990 as amended by Amd.1:1995 +-std=iso9899:199409 ISO/IEC 9899:1990 as amended by Amd.1:1995 * -std=c99 ISO/IEC 9899:1999 +* glibc does not support this standard version. + (Note that -std=c99 is not available in GCC 2.95.2, and that no version of GCC presently existing implements the full C99 standard.) @@ -127,8 +129,8 @@ library in use, so glibc defines them in <features.h>. Programs that test them before including any standard headers may misbehave. GCC doesn't support the optional imaginary types. Nor does it -understand the keyword _Complex. This has the corresponding impact on -the relevant headers. +understand the keyword _Complex before GCC 3.0. This has the +corresponding impact on the relevant headers. glibc's use of extern inline conflicts with C99: in C99, extern inline means that an external definition is generated as well as possibly an @@ -162,7 +164,28 @@ Issues with headers =================== There are various technical issues with the definitions contained in -glibc's headers. See +glibc's headers, listed below. The list below assumes current CVS GCC +as of 2000-10-08, and relates to i686-linux; older GCC may lead to +more problems in the headers. + +Note that the _t suffix is reserved by POSIX, but not by pure ISO C. +Also, the Single Unix Specification generally requires more types to +be included in headers (if _XOPEN_SOURCE is defined appropriately) +than ISO C permits. + +<ctype.h> should not declare size_t. + +<inttypes.h> should not declare wchar_t. + +<signal.h> should not declare size_t. + +<stdint.h> should not declare wchar_t. + +<stdio.h> should not declare or use wchar_t, wint_t or off_t. + +<wchar.h> does not support AMD1; to support it, the functions +fwprintf, fwscanf, wprintf, wscanf, swprintf, swscanf, vfwprintf, +vwprintf, vswprintf and fwide would need to be declared when +__STDC_VERSION__ >= 199409L and not just for C99. -http://sources.redhat.com/ml/libc-alpha/2000-07/msg00259.html -http://sources.redhat.com/ml/libc-alpha/2000-07/msg00279.html +<wctype.h> should not declare size_t. |