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Add clang specific warning suppression macros 

Four new macros are added:

  * DIAG_{PUSH,POP}_NEEDS_COMMENT_CLANG are similar to
    DIAG_{PUSH,POP}_NEEDS_COMMENT, but enable clang specific pragmas to
    handle warnings for options only supported by clang.

  * DIAG_IGNORE_NEEDS_COMMENT_{CLANG,GCC} are similar to
    DIAG_IGNORE_NEEDS_COMMENT, but enable the warning suppression only
    for the referenced compiler.

Reviewed-by: Sam James <sam@gentoo.org>
This commit is contained in:
Adhemerval Zanella 2023-09-12 15:45:24 -03:00 committed by H.J. Lu
parent 6412d8cc46
commit b2556550a0
1 changed files with 22 additions and 0 deletions
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22
include/libc-diag.h
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@ -38,6 +38,16 @@
/* Pop diagnostic state. */
#define DIAG_POP_NEEDS_COMMENT _Pragma ("GCC diagnostic pop")
/* These macros are used to push/pop diagnostic states for warnings only
supported by clang. */
#ifdef __clang__
# define DIAG_PUSH_NEEDS_COMMENT_CLANG _Pragma ("clang diagnostic push")
# define DIAG_POP_NEEDS_COMMENT_CLANG _Pragma ("clang diagnostic pop")
#else
# define DIAG_PUSH_NEEDS_COMMENT_CLANG
# define DIAG_POP_NEEDS_COMMENT_CLANG
#endif
#define _DIAG_STR1(s) #s
#define _DIAG_STR(s) _DIAG_STR1(s)
@ -71,4 +81,16 @@
# define DIAG_IGNORE_Os_NEEDS_COMMENT(version, option)
#endif
/* Similar to DIAG_IGNORE_NEEDS_COMMENT, these macros should be used
to suppress warning supported by the specific compiler. */
#ifndef __clang__
# define DIAG_IGNORE_NEEDS_COMMENT_GCC(VERSION, WARNING) \
DIAG_IGNORE_NEEDS_COMMENT (VERSION, WARNING)
# define DIAG_IGNORE_NEEDS_COMMENT_CLANG(version, option)
#else
# define DIAG_IGNORE_NEEDS_COMMENT_GCC(VERSION, WARNING)
# define DIAG_IGNORE_NEEDS_COMMENT_CLANG(version, option) \
_Pragma (_DIAG_STR (clang diagnostic ignored option))
#endif
#endif /* libc-diag.h */