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-rw-r--r--m4/cxx11.m438
1 files changed, 38 insertions, 0 deletions
diff --git a/m4/cxx11.m4 b/m4/cxx11.m4
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+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