1 dnl @synopsis AC_CXX_NAMESPACES
3 dnl If the compiler can prevent names clashes using namespaces, define
6 dnl @version $Id: ac_cxx_namespaces.m4,v 1.1 2005/01/07 02:52:49 norwin Exp $
7 dnl @author Todd Veldhuizen and Luc Maisonobe <luc@spaceroots.org>
9 AC_DEFUN([AC_CXX_NAMESPACES],
10 [AC_CACHE_CHECK(whether the compiler implements namespaces,
14 AC_TRY_COMPILE([namespace Outer { namespace Inner { int i = 0; }}],
15 [using namespace Outer::Inner; return i;],
16 ac_cv_cxx_namespaces=yes, ac_cv_cxx_namespaces=no)
19 if test "$ac_cv_cxx_namespaces" = yes; then
20 AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces])