diff options
Diffstat (limited to 'include/common.h')
| -rw-r--r-- | include/common.h | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/include/common.h b/include/common.h index 9601ed4823..73e4a19abc 100644 --- a/include/common.h +++ b/include/common.h @@ -273,6 +273,18 @@ enum ec_error_list { #define __fls(n) (31 - __builtin_clz(n)) /* + * Attribute for generating an error if a function is used. + * + * Clang does not have a function attribute to do this. Rely on linker + * errors. :( + */ +#ifdef __clang__ +#define __error(msg) +#else +#define __error(msg) __attribute__((error(msg))) +#endif + +/* * Getting something that works in C and CPP for an arg that may or may * not be defined is tricky. Here, if we have "#define CONFIG_FOO" * we match on the placeholder define, insert the "_, 1," for arg1 and generate @@ -291,16 +303,16 @@ enum ec_error_list { #define __ARG_PLACEHOLDER_ _, 1, #define _config_enabled(cfg, value) \ __config_enabled(__ARG_PLACEHOLDER_##value, cfg, value) -#define __config_enabled(arg1_or_junk, cfg, value) ___config_enabled( \ - arg1_or_junk _,\ - ({ \ - int __undefined = __builtin_strcmp(cfg, #value) == 0; \ - extern int IS_ENABLED_BAD_ARGS(void) __attribute__(( \ - error(cfg " must be <blank>, or not defined.")));\ - if (!__undefined) \ - IS_ENABLED_BAD_ARGS(); \ - 0; \ - })) +#define __config_enabled(arg1_or_junk, cfg, value) \ + ___config_enabled( \ + arg1_or_junk _, ({ \ + int __undefined = __builtin_strcmp(cfg, #value) == 0; \ + extern int IS_ENABLED_BAD_ARGS(void) __error( \ + cfg " must be <blank>, or not defined."); \ + if (!__undefined) \ + IS_ENABLED_BAD_ARGS(); \ + 0; \ + })) #define ___config_enabled(__ignored, val, ...) val /** |