| dnl @synopsis AC_CXX_HAVE_STD_NAMESPACE |
| dnl |
| dnl If the compiler supports the std namespace, define |
| dnl HAVE_STD_NAMESPACE. |
| dnl |
| dnl @category Cxx |
| dnl @author Todd Veldhuizen |
| dnl @author Luc Maisonobe <luc@spaceroots.org> |
| dnl @version 2004-02-04 |
| dnl @license AllPermissive |
| |
| AC_DEFUN([AC_CXX_HAVE_STD_NAMESPACE], |
| [AC_CACHE_CHECK(whether the compiler supports the std namespace, |
| ac_cv_cxx_have_std_namespace, |
| [AC_LANG_SAVE |
| AC_LANG_CPLUSPLUS |
| AC_TRY_COMPILE([#include <iostream> |
| std::istream& is = std::cin; |
| ],[return 0;], |
| ac_cv_cxx_have_std_namespace=yes, ac_cv_cxx_have_std_namespace=no) |
| AC_LANG_RESTORE |
| ]) |
| if test "$ac_cv_cxx_have_std_namespace" = yes; then |
| AC_DEFINE(HAVE_STD_NAMESPACE,,[define if the compiler supports the std namespace]) |
| fi |
| ]) |
