diff options
Diffstat (limited to 'm4/namespaces.m4')
| -rw-r--r-- | m4/namespaces.m4 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/m4/namespaces.m4 b/m4/namespaces.m4 new file mode 100644 index 000000000000..d78dbe4cc2e4 --- /dev/null +++ b/m4/namespaces.m4 @@ -0,0 +1,15 @@ +# 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]) |