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Diffstat (limited to 'm4/ac_cxx_namespaces.m4')
| -rw-r--r-- | m4/ac_cxx_namespaces.m4 | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/m4/ac_cxx_namespaces.m4 b/m4/ac_cxx_namespaces.m4 new file mode 100644 index 0000000..7001b91 --- /dev/null +++ b/m4/ac_cxx_namespaces.m4 @@ -0,0 +1,27 @@ +dnl @synopsis AC_CXX_NAMESPACES +dnl +dnl If the compiler can prevent names clashes using namespaces, define +dnl HAVE_NAMESPACES. +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_NAMESPACES], +[AC_CACHE_CHECK(whether the compiler implements namespaces, +ac_cv_cxx_namespaces, +[AC_LANG_SAVE + AC_LANG_CPLUSPLUS + AC_TRY_COMPILE([namespace Outer { namespace Inner { int i = 0; }}], + [using namespace Outer::Inner; return i;], + ac_cv_cxx_namespaces=yes, ac_cv_cxx_namespaces=no) + AC_LANG_RESTORE +]) +if test "$ac_cv_cxx_namespaces" = yes; then + AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces]) +fi +]) + + |