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- AC_DEFUN([AX_C___BUILTIN_EXPECT], [
- AC_MSG_CHECKING(for __builtin_expect)
- AC_CACHE_VAL(ac_cv___builtin_expect, [
- AC_TRY_COMPILE(
- [int foo(void) { if (__builtin_expect(0, 0)) return 1; return 0; }],
- [],
- ac_cv___builtin_expect=yes,
- ac_cv___builtin_expect=no
- )])
- if test "$ac_cv___builtin_expect" = "yes"; then
- AC_DEFINE(HAVE___BUILTIN_EXPECT, 1, [define if your compiler has __builtin_expect])
- fi
- AC_MSG_RESULT($ac_cv___builtin_expect)
- ])
|
