diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2020-10-19 09:35:39 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2020-10-28 14:55:36 +0100 |
| commit | caabdd0f59a9771ed095efe3ad5a08867b976ab2 (patch) | |
| tree | 3e588a89ccaddec4fce4a183b3e9ccaa7c60fc51 /include/linux/compiler_types.h | |
| parent | f44ca0871b7a98b075560711d48849914a102221 (diff) | |
ctype.h: remove duplicate isdigit() helper
gcc warns a few thousand times about the isdigit() shadow:
include/linux/ctype.h:26:19: warning: declaration of 'isdigit' shadows a built-in function [-Wshadow]
As there is already a compiler builtin, just use that, and make
it clear we do that by defining a macro. Unfortunately, clang
does not have the isdigit() builtin, so this has to be conditional.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/linux/compiler_types.h')
| -rw-r--r-- | include/linux/compiler_types.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index 6e390d58a9f8..5d41dff3f79c 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -64,6 +64,17 @@ static inline void __chk_io_ptr(const volatile void __iomem *ptr) { } /* Attributes */ #include <linux/compiler_attributes.h> +/* Builtins */ + +/* + * __has_builtin is supported on gcc >= 10, clang >= 3 and icc >= 21. + * In the meantime, to support gcc < 10, we implement __has_builtin + * by hand. + */ +#ifndef __has_builtin +#define __has_builtin(x) (0) +#endif + /* Compiler specific macros. */ #ifdef __clang__ #include <linux/compiler-clang.h> |