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| 1 # Checks whether the compiler implements namespaces |
| 2 AC_DEFUN([AC_CXX_NAMESPACES], |
| 3 [AC_CACHE_CHECK(whether the compiler implements namespaces, |
| 4 ac_cv_cxx_namespaces, |
| 5 [AC_LANG_SAVE |
| 6 AC_LANG_CPLUSPLUS |
| 7 AC_TRY_COMPILE([namespace Outer { |
| 8 namespace Inner { int i = 0; }}], |
| 9 [using namespace Outer::Inner; return i;], |
| 10 ac_cv_cxx_namespaces=yes, |
| 11 ac_cv_cxx_namespaces=no) |
| 12 AC_LANG_RESTORE]) |
| 13 if test "$ac_cv_cxx_namespaces" = yes; then |
| 14 AC_DEFINE(HAVE_NAMESPACES, 1, [define if the compiler implements namespaces]
) |
| 15 fi]) |
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