1 # Checks whether the compiler implements namespaces
2 AC_DEFUN([AC_CXX_NAMESPACES],
3 [AC_CACHE_CHECK(whether the compiler implements namespaces,
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)
13 if test "$ac_cv_cxx_namespaces" = yes; then
14 AC_DEFINE(HAVE_NAMESPACES, 1, [define if the compiler implements namespaces])