Squashed 'third_party/gperftools/' content from commit 54505f1
Change-Id: Id02e833828732b0efe7dac722b8485279e67c5fa
git-subtree-dir: third_party/gperftools
git-subtree-split: 54505f1d50c2d1f4676f5e87090b64a117fd980e
diff --git a/m4/stl_namespace.m4 b/m4/stl_namespace.m4
new file mode 100644
index 0000000..989ad80
--- /dev/null
+++ b/m4/stl_namespace.m4
@@ -0,0 +1,25 @@
+# We check what namespace stl code like vector expects to be executed in
+
+AC_DEFUN([AC_CXX_STL_NAMESPACE],
+ [AC_CACHE_CHECK(
+ what namespace STL code is in,
+ ac_cv_cxx_stl_namespace,
+ [AC_REQUIRE([AC_CXX_NAMESPACES])
+ AC_LANG_SAVE
+ AC_LANG_CPLUSPLUS
+ AC_TRY_COMPILE([#include <vector>],
+ [vector<int> t; return 0;],
+ ac_cv_cxx_stl_namespace=none)
+ AC_TRY_COMPILE([#include <vector>],
+ [std::vector<int> t; return 0;],
+ ac_cv_cxx_stl_namespace=std)
+ AC_LANG_RESTORE])
+ if test "$ac_cv_cxx_stl_namespace" = none; then
+ AC_DEFINE(STL_NAMESPACE,,
+ [the namespace where STL code like vector<> is defined])
+ fi
+ if test "$ac_cv_cxx_stl_namespace" = std; then
+ AC_DEFINE(STL_NAMESPACE,std,
+ [the namespace where STL code like vector<> is defined])
+ fi
+])