| Austin Schuh | 745610d | 2015-09-06 18:19:50 -0700 | [diff] [blame] | 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]) |