From 3012187847b2783c49153db3f5486b84074cb2b0 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 28 Feb 2012 12:38:15 +0200
Subject: Build infrastructure for C++11 support

---
 m4/cxx11.m4 | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 m4/cxx11.m4

(limited to 'm4/cxx11.m4')

diff --git a/m4/cxx11.m4 b/m4/cxx11.m4
new file mode 100644
index 0000000..774f20d
--- /dev/null
+++ b/m4/cxx11.m4
@@ -0,0 +1,38 @@
+dnl file      : m4/cxx11.m4
+dnl copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+dnl license   : GNU GPL v2; see accompanying LICENSE file
+dnl
+dnl CXX11(MACRO, DESCRIPTION)
+dnl
+dnl Check if we are compiling in the C++11 mode. If we are, define MACRO as
+dnl both a macro and conditional as well as set the cxx11 variable to 'yes'.
+dnl
+AC_DEFUN([CXX11],
+[
+cxx11=no
+
+AC_MSG_CHECKING([whether we are in C++11 mode])
+
+CXX_LIBTOOL_LINK_IFELSE(
+AC_LANG_SOURCE([[
+#include <memory>
+
+int
+main ()
+{
+  std::shared_ptr<int> p (new int (10));
+  *p = 11;
+}
+]]),
+[cxx11=yes])
+
+if test x"$cxx11" = xyes; then
+  AC_MSG_RESULT([yes])
+  AC_DEFINE([$1], [1], [$2])
+else
+  AC_MSG_RESULT([no])
+fi
+
+AM_CONDITIONAL([$1], [test x$cxx11 = xyes])
+
+])dnl
-- 
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