Imported Upstream version 0.4.0

[deb_pkgs/spamass-milter.git] / ac_cxx_namespaces.m4

diff --git a/ac_cxx_namespaces.m4 b/ac_cxx_namespaces.m4
new file mode 100644 (file)
index 0000000..de90f99
--- /dev/null
+++ b/ac_cxx_namespaces.m4
@@ -0,0 +1,19 @@
+dnl Available from the GNU Autoconf Macro Archive at:
+dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_namespaces.html
+dnl
+dnl $Id: ac_cxx_namespaces.m4,v 1.2 2004/09/07 01:19:27 dnelson Exp $
+dnl @version: 1.3 2004-02-04
+AC_DEFUN([AC_CXX_NAMESPACES],
+[AC_CACHE_CHECK(whether the compiler implements namespaces,
+ac_cv_cxx_namespaces,
+[AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ AC_TRY_COMPILE([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_RESTORE
+])
+if test "$ac_cv_cxx_namespaces" = yes; then
+  AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces])
+fi
+])