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| author | Thomas Weißschuh <linux@weissschuh.net> | 2026-03-18 17:12:42 +0100 |
|---|---|---|
| committer | Thomas Weißschuh <linux@weissschuh.net> | 2026-03-22 11:03:58 +0100 |
| commit | 3eb97c4cbd4d874e7e327ec512f6169934e12b8a (patch) | |
| tree | 6933cddb69ab61724678ea5e0364dfe0d98c0cf8 /tools/include | |
| parent | 9da0f529c089f00e6ab8b552d7407e612b7245a8 (diff) | |
| download | linux-3eb97c4cbd4d874e7e327ec512f6169934e12b8a.tar.gz linux-3eb97c4cbd4d874e7e327ec512f6169934e12b8a.zip | |
tools/nolibc: avoid -Wundef warning for __STDC_VERSION__
With -std=c89 the macro __STDC_VERSION__ is not defined.
While undefined identifiers in '#if' directives are assumed to be '0',
with -Wundef a warning is emitted.
Avoid the warning by explicitly falling back to '0' if __STDC_VERSION__
is not provided by the preprocessor.
Fixes: 37219aa5b123 ("tools/nolibc: add __nolibc_static_assert()")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260318-nolibc-wundef-v1-1-fcb7f9ac7298@weissschuh.net
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/nolibc/compiler.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/include/nolibc/compiler.h b/tools/include/nolibc/compiler.h index f03f84cfadce..1c410a62c528 100644 --- a/tools/include/nolibc/compiler.h +++ b/tools/include/nolibc/compiler.h @@ -47,6 +47,12 @@ # define __nolibc_fallthrough do { } while (0) #endif /* __nolibc_has_attribute(fallthrough) */ +#if defined(__STDC_VERSION__) +# define __nolibc_stdc_version __STDC_VERSION__ +#else +# define __nolibc_stdc_version 0 +#endif + #define __nolibc_version(_major, _minor, _patch) ((_major) * 10000 + (_minor) * 100 + (_patch)) #ifdef __GNUC__ @@ -63,7 +69,7 @@ # define __nolibc_clang_version 0 #endif /* __clang__ */ -#if __STDC_VERSION__ >= 201112L || \ +#if __nolibc_stdc_version >= 201112L || \ __nolibc_gnuc_version >= __nolibc_version(4, 6, 0) || \ __nolibc_clang_version >= __nolibc_version(3, 0, 0) # define __nolibc_static_assert(_t) _Static_assert(_t, "") |