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- # Checks whether the compiler implements namespaces
- 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, 1, [define if the compiler implements namespaces])
- fi])
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