stl_namespace.m4 revision bdd62c531bbdea115a3a7e71bba91c19dd319cc4 
1# We check what namespace stl code like vector expects to be executed in
2
3AC_DEFUN([AC_CXX_STL_NAMESPACE],
4  [AC_CACHE_CHECK(
5      what namespace STL code is in,
6      ac_cv_cxx_stl_namespace,
7      [AC_REQUIRE([AC_CXX_NAMESPACES])
8      AC_LANG_SAVE
9      AC_LANG_CPLUSPLUS
10      AC_TRY_COMPILE([#include <vector>],
11                     [vector<int> t; return 0;],
12                     ac_cv_cxx_stl_namespace=none)
13      AC_TRY_COMPILE([#include <vector>],
14                     [std::vector<int> t; return 0;],
15                     ac_cv_cxx_stl_namespace=std)
16      AC_LANG_RESTORE])
17   if test "$ac_cv_cxx_stl_namespace" = none; then
18      AC_DEFINE(STL_NAMESPACE,,
19                [the namespace where STL code like vector<> is defined])
20   fi
21   if test "$ac_cv_cxx_stl_namespace" = std; then
22      AC_DEFINE(STL_NAMESPACE,std,
23                [the namespace where STL code like vector<> is defined])
24   fi
25])
26