diff options
Diffstat (limited to 'autoconf/m4/cxx_namespaces.m4')
| -rw-r--r-- | autoconf/m4/cxx_namespaces.m4 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/autoconf/m4/cxx_namespaces.m4 b/autoconf/m4/cxx_namespaces.m4 new file mode 100644 index 0000000000000..d8d650e4d449c --- /dev/null +++ b/autoconf/m4/cxx_namespaces.m4 @@ -0,0 +1,19 @@ +# Check for C++ namespace support. This is from +# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_namespaces.html +# +AC_DEFUN([AC_CXX_NAMESPACES], +[AC_CACHE_CHECK(whether the compiler implements namespaces, +ac_cv_cxx_namespaces, +[AC_LANG_PUSH([C++]) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM( + [[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_POP([C++]) +]) +if test "$ac_cv_cxx_namespaces" = yes; then + AC_DEFINE(HAVE_NAMESPACES,,[define if the compiler implements namespaces]) +fi +]) + |