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| author | Levi Morrison <levim@php.net> | 2015-03-20 11:58:58 -0600 |
|---|---|---|
| committer | Levi Morrison <levim@php.net> | 2015-03-22 10:31:14 -0600 |
| commit | 017f89e871a8411765b82cecd09c355377f3a8df (patch) | |
| tree | b61dad6185fec86449c187479296d03d1b2d0474 /acinclude.m4 | |
| parent | a50e9d87f265f911f9c76ca0e998588be0bd6eac (diff) | |
| download | php-git-017f89e871a8411765b82cecd09c355377f3a8df.tar.gz | |
Move check for __builtin_expect to configure
This allows __builtin_expect to be used more accurately
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index b2220c3d5e..478ea31761 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -3031,3 +3031,21 @@ AC_DEFUN([PHP_CHECK_STDINT_TYPES], [ ]) AC_DEFINE([PHP_HAVE_STDINT_TYPES], [1], [Checked for stdint types]) ]) + +dnl PHP_CHECK_BUILTIN_EXPECT +AC_DEFUN([PHP_CHECK_BUILTIN_EXPECT], [ + AC_MSG_CHECKING([for __builtin_expect]) + + AC_TRY_LINK(, [ + return __builtin_expect(1,1) ? 1 : 0; + ], [ + have_builtin_expect=1 + AC_MSG_RESULT([yes]) + ], [ + have_builtin_expect=0 + AC_MSG_RESULT([no]) + ]) + + AC_DEFINE([PHP_HAVE_BUILTIN_EXPECT], [$have_builtin_expect], [Whether the compiler supports __builtin_expect]) + +]) |