Go to the documentation of this file. 23 #define GCC_MAKE_VERSION(major, minor, patchlevel) ((major) * 10000 + (minor) * 100 + patchlevel) 26 #define GCC_VERSION GCC_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__) 32 # define CLANG_VERSION GCC_MAKE_VERSION(__clang_major__, __clang_minor__, __clang_patchlevel__) 33 #elif defined(__GNUC__) 34 # define CLANG_VERSION 0 41 #define GCC_CHECK_VERSION(major, minor) \ 42 (CLANG_VERSION == 0 && \ 43 GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0)) 49 #define CLANG_OR_GCC_VERSION(major, minor) \ 50 (CLANG_VERSION > 0 || GCC_CHECK_VERSION(major, minor)) 56 #define GCC_OLDER_THAN(major, minor) \ 57 (GCC_VERSION > 0 && CLANG_VERSION == 0 && \ 58 GCC_VERSION < GCC_MAKE_VERSION(major, minor, 0)) 61 # if __clang_major__ < 3 62 # error Sorry, your clang version is too old. You need at least version 3.1. 64 #elif defined(__GNUC__) 65 # if GCC_OLDER_THAN(4,9) 66 # error Sorry, your gcc version is too old. You need at least version 4.9. 69 # warning Untested compiler. Use at your own risk! 75 #define CLANG_CHECK_VERSION(major, minor) \ 76 (CLANG_VERSION >= GCC_MAKE_VERSION(major, minor, 0)) 78 #if CLANG_OR_GCC_VERSION(4,0) 82 #define gcc_const __attribute__((const)) 83 #define gcc_deprecated __attribute__((deprecated)) 84 #define gcc_may_alias __attribute__((may_alias)) 85 #define gcc_malloc __attribute__((malloc)) 86 #define gcc_noreturn __attribute__((noreturn)) 87 #define gcc_packed __attribute__((packed)) 88 #define gcc_printf(a,b) __attribute__((format(printf, a, b))) 89 #define gcc_pure __attribute__((pure)) 90 #define gcc_sentinel __attribute__((sentinel)) 91 #define gcc_unused __attribute__((unused)) 92 #define gcc_warn_unused_result __attribute__((warn_unused_result)) 94 #define gcc_nonnull(...) __attribute__((nonnull(__VA_ARGS__))) 95 #define gcc_nonnull_all __attribute__((nonnull)) 97 #define gcc_likely(x) __builtin_expect (!!(x), 1) 98 #define gcc_unlikely(x) __builtin_expect (!!(x), 0) 100 #define gcc_visibility_hidden __attribute__((visibility("hidden"))) 101 #define gcc_visibility_default __attribute__((visibility("default"))) 103 #define gcc_always_inline __attribute__((always_inline)) 110 #define gcc_deprecated 111 #define gcc_may_alias 115 #define gcc_printf(a,b) 119 #define gcc_warn_unused_result 121 #define gcc_nonnull(...) 122 #define gcc_nonnull_all 124 #define gcc_likely(x) (x) 125 #define gcc_unlikely(x) (x) 127 #define gcc_visibility_hidden 128 #define gcc_visibility_default 130 #define gcc_always_inline inline 134 #if CLANG_OR_GCC_VERSION(4,3) 136 #define gcc_hot __attribute__((hot)) 137 #define gcc_cold __attribute__((cold)) 146 #if GCC_CHECK_VERSION(4,6) 147 #define gcc_flatten __attribute__((flatten)) 154 #define gcc_restrict restrict 155 #elif CLANG_OR_GCC_VERSION(4,0) 157 #define gcc_restrict __restrict__ 163 #ifndef __has_feature 165 #define __has_feature(x) 0 168 #if __has_feature(attribute_unused_on_fields) 169 #define gcc_unused_field gcc_unused 171 #define gcc_unused_field 174 #if defined(__GNUC__) || defined(__clang__) 175 #define gcc_unreachable() __builtin_unreachable() 177 #define gcc_unreachable()