diff options
Diffstat (limited to 'src/lib/cc/compat_compiler.h')
| -rw-r--r-- | src/lib/cc/compat_compiler.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/src/lib/cc/compat_compiler.h b/src/lib/cc/compat_compiler.h index fbe6a38f1f..d9ccabb2b3 100644 --- a/src/lib/cc/compat_compiler.h +++ b/src/lib/cc/compat_compiler.h @@ -88,7 +88,7 @@ # define ENABLE_GCC_WARNING(warningopt) \ PRAGMA_DIAGNOSTIC_(warning PRAGMA_JOIN_STRINGIFY_(-W,warningopt)) #endif /* defined(__clang__) || GCC_VERSION >= 406 */ -#else /* !(defined(__GNUC__)) */ +#else /* !defined(__GNUC__) */ /* not gcc at all */ # define DISABLE_GCC_WARNING(warning) # define ENABLE_GCC_WARNING(warning) @@ -201,7 +201,7 @@ * structure <b>st</b>. Example: * <pre> * struct a { int foo; int bar; } x; - * off_t bar_offset = offsetof(struct a, bar); + * ptrdiff_t bar_offset = offsetof(struct a, bar); * int *bar_p = STRUCT_VAR_P(&x, bar_offset); * *bar_p = 3; * </pre> @@ -223,4 +223,16 @@ /** Macro: Yields the number of elements in array x. */ #define ARRAY_LENGTH(x) ((sizeof(x)) / sizeof(x[0])) -#endif /* !defined(TOR_COMPAT_H) */ +/** + * "Eat" a semicolon that somebody puts at the end of a top-level macro. + * + * Frequently, we want to declare a macro that people will use at file scope, + * and we want to allow people to put a semicolon after the macro. + * + * This declaration of a struct can be repeated any number of times, and takes + * a trailing semicolon afterwards. + **/ +#define EAT_SEMICOLON \ + struct dummy_semicolon_eater__ + +#endif /* !defined(TOR_COMPAT_COMPILER_H) */ |