diff options
Diffstat (limited to 'gcc/system.h')
| -rw-r--r-- | gcc/system.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/system.h b/gcc/system.h index 6b58083..7938fb6 100644 --- a/gcc/system.h +++ b/gcc/system.h @@ -490,6 +490,13 @@ extern void abort PARAMS ((void)); #endif /* ! __FUNCTION__ */ #endif +/* __builtin_expect(A, B) evaluates to A, but notifies the compiler that + the most likely value of A is B. This feature was added at some point + between 2.95 and 3.0. Let's use 3.0 as the lower bound for now. */ +#if (GCC_VERSION < 3000) +#define __builtin_expect(a, b) (a) +#endif + /* Provide some sort of boolean type. We use stdbool.h if it's available. This must be after all inclusion of system headers, as some of them will mess us up. */ |