| cristy | 964cb7f | 2010-04-25 23:18:00 +0000 | [diff] [blame] | 1 | # =========================================================================== |
| 2 | # http://www.gnu.org/software/autoconf-archive/ax_cxx_namespace_std.html |
| 3 | # =========================================================================== |
| 4 | # |
| 5 | # SYNOPSIS |
| 6 | # |
| 7 | # AX_CXX_NAMESPACE_STD |
| 8 | # |
| 9 | # DESCRIPTION |
| 10 | # |
| 11 | # If the compiler supports namespace std, define HAVE_NAMESPACE_STD. |
| 12 | # |
| 13 | # LICENSE |
| 14 | # |
| 15 | # Copyright (c) 2009 Todd Veldhuizen |
| 16 | # Copyright (c) 2009 Luc Maisonobe <luc@spaceroots.org> |
| 17 | # |
| 18 | # Copying and distribution of this file, with or without modification, are |
| 19 | # permitted in any medium without royalty provided the copyright notice |
| 20 | # and this notice are preserved. This file is offered as-is, without any |
| 21 | # warranty. |
| 22 | |
| 23 | #serial 6 |
| 24 | |
| 25 | AU_ALIAS([AC_CXX_NAMESPACE_STD], [AX_CXX_NAMESPACE_STD]) |
| 26 | AC_DEFUN([AX_CXX_NAMESPACE_STD], [ |
| 27 | AC_CACHE_CHECK(if g++ supports namespace std, |
| 28 | ax_cv_cxx_have_std_namespace, |
| 29 | [AC_LANG_SAVE |
| 30 | AC_LANG_CPLUSPLUS |
| 31 | AC_TRY_COMPILE([#include <iostream> |
| 32 | std::istream& is = std::cin;],, |
| 33 | ax_cv_cxx_have_std_namespace=yes, ax_cv_cxx_have_std_namespace=no) |
| 34 | AC_LANG_RESTORE |
| 35 | ]) |
| 36 | if test "$ax_cv_cxx_have_std_namespace" = yes; then |
| 37 | AC_DEFINE(HAVE_NAMESPACE_STD,,[Define if g++ supports namespace std. ]) |
| 38 | fi |
| 39 | ]) |