| Revision | 6bbf22f049f230c6e8338a3ce907820ed59bd231 (tree) |
|---|---|
| Time | 2013-08-23 21:08:37 |
| Author | Katsuhiko Nishimra <ktns.87@gmai...> |
| Commiter | Katsuhiko Nishimra |
Downloaded m4/ac_cxx_namespaces.m4.
see http://ac-archive.sourceforge.net/ac-archive/ac_cxx_namespaces.html.
git-svn-id: https://svn.sourceforge.jp/svnroot/molds/branches/automake@1497 1136aad2-a195-0410-b898-f5ea1d11b9d8
src/m4/ac_cxx_namespaces.m4 (diff)| @@ -0,0 +1,25 @@ | ||
| 1 | +dnl @synopsis AC_CXX_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_NAMESPACES], | |
| 13 | +[AC_CACHE_CHECK(whether the compiler implements namespaces, | |
| 14 | +ac_cv_cxx_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_namespaces=yes, ac_cv_cxx_namespaces=no) | |
| 20 | + AC_LANG_RESTORE | |
| 21 | +]) | |
| 22 | +if test "$ac_cv_cxx_namespaces" = yes; then | |
| 23 | + AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces]) | |
| 24 | +fi | |
| 25 | +]) |
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