From f17a25c88b892d30c2b41ba7ecdfbdfb2b4be9cc Mon Sep 17 00:00:00 2001
From: Dan Gohman <djg@cray.com>
Date: Wed, 18 Jul 2007 16:29:46 +0000
Subject: It's not necessary to do rounding for alloca operations when the
 requested alignment is equal to the stack alignment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
---
 autoconf/m4/cxx_namespaces.m4 | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 autoconf/m4/cxx_namespaces.m4

(limited to 'autoconf/m4/cxx_namespaces.m4')

diff --git a/autoconf/m4/cxx_namespaces.m4 b/autoconf/m4/cxx_namespaces.m4
new file mode 100644
index 0000000..d8d650e
--- /dev/null
+++ b/autoconf/m4/cxx_namespaces.m4
@@ -0,0 +1,19 @@
+# Check for C++ namespace support.  This is from
+# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_namespaces.html
+#
+AC_DEFUN([AC_CXX_NAMESPACES],
+[AC_CACHE_CHECK(whether the compiler implements namespaces,
+ac_cv_cxx_namespaces,
+[AC_LANG_PUSH([C++])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+   [[namespace Outer { namespace Inner { int i = 0; }}]],
+   [[using namespace Outer::Inner; return i;]])], 
+   ac_cv_cxx_namespaces=yes, 
+   ac_cv_cxx_namespaces=no)
+ AC_LANG_POP([C++])
+])
+if test "$ac_cv_cxx_namespaces" = yes; then
+  AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces])
+fi
+])
+
-- 
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