1 # Check for hash_map extension. This is from
2 # http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_hash_map.html
3 AC_DEFUN([AC_CXX_HAVE_STD_EXT_HASH_MAP],
4 [AC_CACHE_CHECK([whether the compiler has <ext/hash_map> defining template class std::hash_map],
5 ac_cv_cxx_have_std_ext_hash_map,
6 [AC_REQUIRE([AC_CXX_NAMESPACES])
9 AC_TRY_COMPILE([#include <ext/hash_map>
10 #ifdef HAVE_NAMESPACES
12 #endif],[hash_map<int, int> t;],
13 [ac_cv_cxx_have_std_ext_hash_map=yes], [ac_cv_cxx_have_std_ext_hash_map=no])
15 HAVE_STD_EXT_HASH_MAP=0
16 if test "$ac_cv_cxx_have_std_ext_hash_map" = yes
18 HAVE_STD_EXT_HASH_MAP=1
20 AC_SUBST(HAVE_STD_EXT_HASH_MAP)])
22 AC_DEFUN([AC_CXX_HAVE_GNU_EXT_HASH_MAP],
23 [AC_CACHE_CHECK([whether the compiler has <ext/hash_map> defining template class __gnu_cxx::hash_map],
24 ac_cv_cxx_have_gnu_ext_hash_map,
25 [AC_REQUIRE([AC_CXX_NAMESPACES])
28 AC_TRY_COMPILE([#include <ext/hash_map>
29 #ifdef HAVE_NAMESPACES
30 using namespace __gnu_cxx;
31 #endif],[hash_map<int,int> t; ],
32 [ac_cv_cxx_have_gnu_ext_hash_map=yes],[ac_cv_cxx_have_gnu_ext_hash_map=no])
34 HAVE_GNU_EXT_HASH_MAP=0
35 if test "$ac_cv_cxx_have_gnu_ext_hash_map" = yes
37 HAVE_GNU_EXT_HASH_MAP=1
39 AC_SUBST(HAVE_GNU_EXT_HASH_MAP)])
41 AC_DEFUN([AC_CXX_HAVE_GLOBAL_HASH_MAP],
42 [AC_CACHE_CHECK([whether the compiler has <hash_map> defining template class ::hash_map],
43 ac_cv_cxx_have_global_hash_map,
44 [AC_REQUIRE([AC_CXX_NAMESPACES])
47 AC_TRY_COMPILE([#include <hash_map>],[hash_map<int,int> t; ],
48 [ac_cv_cxx_have_global_hash_map=yes], [ac_cv_cxx_have_global_hash_map=no])
50 HAVE_GLOBAL_HASH_MAP=0
51 if test "$ac_cv_cxx_have_global_hash_map" = yes
53 HAVE_GLOBAL_HASH_MAP=1
55 AC_SUBST(HAVE_GLOBAL_HASH_MAP)])
57 AC_DEFUN([AC_CXX_HAVE_HASH_MAP],
58 [AC_CXX_HAVE_STD_EXT_HASH_MAP
59 AC_CXX_HAVE_GNU_EXT_HASH_MAP
60 AC_CXX_HAVE_GLOBAL_HASH_MAP])