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# We check two things: where the include file is for unordered_map, and
# what namespace unordered_map lives in within that include file. We
# include AC_COMPILE_IFELSE for all the combinations we've seen in the
# wild. We define HAVE_UNORDERED_MAP and HAVE_UNORDERED_SET if we have
# them, UNORDERED_MAP_H and UNORDERED_SET_H to their location and
# UNORDERED_NAMESPACE to be the namespace unordered_map is defined in.
AC_DEFUN([PANDORA_CXX_STL_UNORDERED],[
save_CXXFLAGS="${CXXFLAGS}"
CXXFLAGS="${AM_CXXFLAGS} ${CXXFLAGS}"
AC_LANG_PUSH(C++)
AC_CACHE_CHECK([for STL unordered_map],
[pandora_cv_stl_unordered],[
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <unordered_map>]],
[[std::unordered_map<int, int> t]])],
[pandora_cv_stl_unordered="yes"],
[pandora_cv_stl_unordered="no"])])
AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes"],[
AC_CACHE_CHECK([for tr1 unordered_map],
[pandora_cv_tr1_unordered],[
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
/* We put in this define because of a YACC symbol clash in Drizzle.
Seriously... I cannot believe the GCC guys defined a piece of the internals
of this named IF - and I can't believe that YACC generates a token define
called IF. Really?
*/
#define IF 21;
#include <tr1/unordered_map>
]],[[
std::tr1::unordered_map<int, int> t
]])],
[pandora_cv_tr1_unordered="yes"],
[pandora_cv_tr1_unordered="no"])])
])
AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes" -a "x${pandora_cv_tr1_unordered}" != "xyes"],[
AC_CACHE_CHECK([for boost unordered_map],
[pandora_cv_boost_unordered],[
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <boost/unordered_map.hpp>]],
[[boost::unordered_map<int, int> t]])],
[pandora_cv_boost_unordered="yes"],
[pandora_cv_boost_unordered="no"])])
])
CXXFLAGS="${save_CXXFLAGS}"
AC_LANG_POP()
AS_IF([test "x${pandora_cv_stl_unordered}" = "xyes"],[
AC_DEFINE(HAVE_STD_UNORDERED_MAP, 1,
[if the compiler has std::unordered_map])
AC_DEFINE(HAVE_STD_UNORDERED_SET, 1,
[if the compiler has std::unordered_set])
pandora_has_unordered=yes
])
AS_IF([test "x${pandora_cv_tr1_unordered}" = "xyes"],[
AC_DEFINE(HAVE_TR1_UNORDERED_MAP, 1,
[if the compiler has std::tr1::unordered_map])
AC_DEFINE(HAVE_TR1_UNORDERED_SET, 1,
[if the compiler has std::tr1::unordered_set])
pandora_has_unordered=yes
])
AS_IF([test "x${pandora_cv_boost_unordered}" = "xyes"],[
AC_DEFINE(HAVE_BOOST_UNORDERED_MAP, 1,
[if the compiler has boost::unordered_map])
AC_DEFINE(HAVE_BOOST_UNORDERED_SET, 1,
[if the compiler has boost::unordered_set])
pandora_has_unordered=yes
])
AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
AC_MSG_WARN([could not find an STL unordered_map])
])
])
AC_DEFUN([PANDORA_HAVE_CXX_UNORDERED],[
AC_REQUIRE([PANDORA_CXX_STL_UNORDERED])
])
AC_DEFUN([PANDORA_REQUIRE_CXX_UNORDERED],[
AC_REQUIRE([PANDORA_HAVE_CXX_UNORDERED])
AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
AC_MSG_ERROR([An STL compliant unordered_map is required for ${PACKAGE}.
Implementations can be found in Recent versions of gcc and in boost])
])
])
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