From c6e9e4110e7878cdd13c4b92f79101a2b2e03c97 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 11 May 2014 00:33:45 +0000
Subject: configure.in: check typeof

* configure.in (rb_cv_typeof): check typeof extension for ccan
  headers.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45916 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 configure.in | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure.in b/configure.in
index dc96f2f1de..fb3b86e76b 100644
--- a/configure.in
+++ b/configure.in
@@ -1505,6 +1505,12 @@ EOH
 ])dnl
 ])dnl
 
+AC_CACHE_CHECK(for typeof, rb_cv_typeof,
+  [AC_TRY_COMPILE([int i; typeof(i) j;], [], [rb_cv_typeof=yes], [rb_cv_typeof=no])])
+if test "$rb_cv_typeof" = yes; then
+  AC_DEFINE(HAVE_TYPEOF)
+fi
+
 dnl RUBY_FUNC_ATTRIBUTE(attrib, macroname, cachevar, condition)
 AC_DEFUN([RUBY_FUNC_ATTRIBUTE], [dnl
 m4_ifval([$2], dnl
-- 
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