| cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame^] | 1 | dnl @synopsis AC_CXX_HAVE_NAMESPACES |
| 2 | dnl |
| 3 | dnl If the compiler can prevent names clashes using namespaces, define |
| 4 | dnl HAVE_NAMESPACES. |
| 5 | dnl |
| 6 | dnl @category Cxx |
| 7 | dnl @author Todd Veldhuizen |
| 8 | dnl @author Luc Maisonobe <luc@spaceroots.org> |
| 9 | dnl @version 2004-02-04 |
| 10 | dnl @license AllPermissive |
| 11 | |
| 12 | AC_DEFUN([AC_CXX_HAVE_NAMESPACES], |
| 13 | [AC_CACHE_CHECK(whether the compiler implements namespaces, |
| 14 | ac_cv_cxx_have_namespaces, |
| 15 | [AC_LANG_SAVE |
| 16 | AC_LANG_CPLUSPLUS |
| 17 | AC_TRY_COMPILE([namespace Outer { namespace Inner { int i = 0; }}], |
| 18 | [using namespace Outer::Inner; return i;], |
| 19 | ac_cv_cxx_have_namespaces=yes, ac_cv_cxx_have_namespaces=no) |
| 20 | AC_LANG_RESTORE |
| 21 | ]) |
| 22 | if test "$ac_cv_cxx_have_namespaces" = yes; then |
| 23 | AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces]) |
| 24 | fi |
| 25 | ]) |