Separate Simple Backend creation from initialization.
[chromium-blink-merge.git] / third_party / tcmalloc / vendor / m4 / namespaces.m4
blobd78dbe4cc2e483809c3e4395a07af4b3afb5cac7
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])