Blame m4/ac_have_builtin_expect.m4

Packit 18d29c
AC_DEFUN([AX_C___BUILTIN_EXPECT], [
Packit 18d29c
  AC_MSG_CHECKING(for __builtin_expect)
Packit 18d29c
  AC_CACHE_VAL(ac_cv___builtin_expect, [
Packit 18d29c
    AC_TRY_COMPILE(
Packit 18d29c
      [int foo(void) { if (__builtin_expect(0, 0)) return 1; return 0; }],
Packit 18d29c
      [],
Packit 18d29c
      ac_cv___builtin_expect=yes,
Packit 18d29c
      ac_cv___builtin_expect=no
Packit 18d29c
    )])
Packit 18d29c
  if test "$ac_cv___builtin_expect" = "yes"; then
Packit 18d29c
    AC_DEFINE(HAVE___BUILTIN_EXPECT, 1, [define if your compiler has __builtin_expect])
Packit 18d29c
  fi
Packit 18d29c
  AC_MSG_RESULT($ac_cv___builtin_expect)
Packit 18d29c
])