From afe04691aca3f669f517adaeb5bd4a87a481fb4a Mon Sep 17 00:00:00 2001
From: Vincent Ambo <tazjin@google.com>
Date: Wed, 27 May 2020 01:26:30 +0100
Subject: Squashed 'third_party/glog/' content from commit 9ef754a3023

git-subtree-dir: third_party/glog
git-subtree-split: 9ef754a3023e6fd10f20fe53dfca96dd898182e3
---
 m4/ac_have_builtin_expect.m4 | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 m4/ac_have_builtin_expect.m4

(limited to 'm4/ac_have_builtin_expect.m4')

diff --git a/m4/ac_have_builtin_expect.m4 b/m4/ac_have_builtin_expect.m4
new file mode 100644
index 000000000000..e91b6fd987ed
--- /dev/null
+++ b/m4/ac_have_builtin_expect.m4
@@ -0,0 +1,14 @@
+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)
+])
-- 
cgit 1.4.1