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Diffstat (limited to 'include/libc-internal.h')
| -rw-r--r-- | include/libc-internal.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/libc-internal.h b/include/libc-internal.h index 2ced1c1..bca59a4 100644 --- a/include/libc-internal.h +++ b/include/libc-internal.h @@ -76,4 +76,35 @@ extern void __init_misc (int, char **, char **); #define ignore_value(x) \ ({ __typeof__ (x) __ignored_value = (x); (void) __ignored_value; }) +/* The macros to control diagnostics are structured like this, rather + than a single macro that both pushes and pops diagnostic state and + takes the affected code as an argument, because the GCC pragmas + work by disabling the diagnostic for a range of source locations + and do not work when all the pragmas and the affected code are in a + single macro expansion. */ + +/* Push diagnostic state. */ +#define DIAG_PUSH_NEEDS_COMMENT _Pragma ("GCC diagnostic push") + +/* Pop diagnostic state. */ +#define DIAG_POP_NEEDS_COMMENT _Pragma ("GCC diagnostic pop") + +#define _DIAG_STR1(s) #s +#define _DIAG_STR(s) _DIAG_STR1(s) + +/* Ignore the diagnostic OPTION. VERSION is the most recent GCC + version for which the diagnostic has been confirmed to appear in + the absence of the pragma (in the form MAJOR.MINOR for GCC 4.x, + just MAJOR for GCC 5 and later). Uses of this pragma should be + reviewed when the GCC version given is no longer supported for + building glibc; the version number should always be on the same + source line as the macro name, so such uses can be found with grep. + Uses should come with a comment giving more details of the + diagnostic, and an architecture on which it is seen if possibly + optimization-related and not in architecture-specific code. This + macro should only be used if the diagnostic seems hard to fix (for + example, optimization-related false positives). */ +#define DIAG_IGNORE_NEEDS_COMMENT(version, option) \ + _Pragma (_DIAG_STR (GCC diagnostic ignored option)) + #endif /* _LIBC_INTERNAL */ |