llvm-6502/autoconf/m4/cxx_hash_map.m4
Reid Spencer 491f6812ef Individual autoconf function broken out of acincludes.m4. This change
per the recommended style guide for autoconf and so that individual
autoconf functions can more easily be shared across projects.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16223 91177308-0d34-0410-b5e6-96231b3b80d8
2004-09-07 06:56:14 +00:00

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# Check for hash_map extension. This is from
# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_hash_map.html
AC_DEFUN([AC_CXX_HAVE_STD_EXT_HASH_MAP],
[AC_CACHE_CHECK([whether the compiler has <ext/hash_map> defining template class std::hash_map],
ac_cv_cxx_have_std_ext_hash_map,
[AC_REQUIRE([AC_CXX_NAMESPACES])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <ext/hash_map>
#ifdef HAVE_NAMESPACES
using namespace std;
#endif],[hash_map<int, int> t;],
[ac_cv_cxx_have_std_ext_hash_map=yes], [ac_cv_cxx_have_std_ext_hash_map=no])
AC_LANG_RESTORE])
HAVE_STD_EXT_HASH_MAP=0
if test "$ac_cv_cxx_have_std_ext_hash_map" = yes
then
HAVE_STD_EXT_HASH_MAP=1
fi
AC_SUBST(HAVE_STD_EXT_HASH_MAP)])
AC_DEFUN([AC_CXX_HAVE_GNU_EXT_HASH_MAP],
[AC_CACHE_CHECK([whether the compiler has <ext/hash_map> defining template class __gnu_cxx::hash_map],
ac_cv_cxx_have_gnu_ext_hash_map,
[AC_REQUIRE([AC_CXX_NAMESPACES])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <ext/hash_map>
#ifdef HAVE_NAMESPACES
using namespace __gnu_cxx;
#endif],[hash_map<int,int> t; ],
[ac_cv_cxx_have_gnu_ext_hash_map=yes],[ac_cv_cxx_have_gnu_ext_hash_map=no])
AC_LANG_RESTORE])
HAVE_GNU_EXT_HASH_MAP=0
if test "$ac_cv_cxx_have_gnu_ext_hash_map" = yes
then
HAVE_GNU_EXT_HASH_MAP=1
fi
AC_SUBST(HAVE_GNU_EXT_HASH_MAP)])
AC_DEFUN([AC_CXX_HAVE_GLOBAL_HASH_MAP],
[AC_CACHE_CHECK([whether the compiler has <hash_map> defining template class ::hash_map],
ac_cv_cxx_have_global_hash_map,
[AC_REQUIRE([AC_CXX_NAMESPACES])
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <hash_map>],[hash_map<int,int> t; ],
[ac_cv_cxx_have_global_hash_map=yes], [ac_cv_cxx_have_global_hash_map=no])
AC_LANG_RESTORE])
HAVE_GLOBAL_HASH_MAP=0
if test "$ac_cv_cxx_have_global_hash_map" = yes
then
HAVE_GLOBAL_HASH_MAP=1
fi
AC_SUBST(HAVE_GLOBAL_HASH_MAP)])
AC_DEFUN([AC_CXX_HAVE_HASH_MAP],
[AC_CXX_HAVE_STD_EXT_HASH_MAP
AC_CXX_HAVE_GNU_EXT_HASH_MAP
AC_CXX_HAVE_GLOBAL_HASH_MAP])