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# Copyright (C) 2008 Sun Microsystems, Inc.
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# This file is free software; Sun Microsystems, Inc.
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# We check two things: where the include file is for unordered_map, and
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# what namespace unordered_map lives in within that include file. We
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# include AC_COMPILE_IFELSE for all the combinations we've seen in the
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# wild. We define HAVE_UNORDERED_MAP and HAVE_UNORDERED_SET if we have
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# them, UNORDERED_MAP_H and UNORDERED_SET_H to their location and
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# UNORDERED_NAMESPACE to be the namespace unordered_map is defined in.
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AC_DEFUN([PANDORA_CXX_STL_UNORDERED],[
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save_CXXFLAGS="${CXXFLAGS}"
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CXXFLAGS="${AM_CXXFLAGS} ${CXXFLAGS}"
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AC_CACHE_CHECK([for STL unordered_map],
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[pandora_cv_stl_unordered],[
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[AC_LANG_PROGRAM([[#include <unordered_map>]],
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[[std::unordered_map<int, int> t]])],
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[pandora_cv_stl_unordered="yes"],
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[pandora_cv_stl_unordered="no"])])
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AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes"],[
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AC_CACHE_CHECK([for tr1 unordered_map],
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[pandora_cv_tr1_unordered],[
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/* We put in this define because of a YACC symbol clash in Drizzle.
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Seriously... I cannot believe the GCC guys defined a piece of the internals
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of this named IF - and I can't believe that YACC generates a token define
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#include <tr1/unordered_map>
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std::tr1::unordered_map<int, int> t
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[pandora_cv_tr1_unordered="yes"],
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[pandora_cv_tr1_unordered="no"])])
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AS_IF([test "x${pandora_cv_stl_unordered}" != "xyes" -a "x${pandora_cv_tr1_unordered}" != "xyes"],[
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AC_CACHE_CHECK([for boost unordered_map],
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[pandora_cv_boost_unordered],[
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[AC_LANG_PROGRAM([[#include <boost/unordered_map.hpp>]],
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[[boost::unordered_map<int, int> t]])],
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[pandora_cv_boost_unordered="yes"],
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[pandora_cv_boost_unordered="no"])])
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CXXFLAGS="${save_CXXFLAGS}"
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AS_IF([test "x${pandora_cv_stl_unordered}" = "xyes"],[
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AC_DEFINE(HAVE_STD_UNORDERED_MAP, 1,
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[if the compiler has std::unordered_map])
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AC_DEFINE(HAVE_STD_UNORDERED_SET, 1,
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[if the compiler has std::unordered_set])
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pandora_has_unordered=yes
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AS_IF([test "x${pandora_cv_tr1_unordered}" = "xyes"],[
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AC_DEFINE(HAVE_TR1_UNORDERED_MAP, 1,
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[if the compiler has std::tr1::unordered_map])
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AC_DEFINE(HAVE_TR1_UNORDERED_SET, 1,
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[if the compiler has std::tr1::unordered_set])
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pandora_has_unordered=yes
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AS_IF([test "x${pandora_cv_boost_unordered}" = "xyes"],[
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AC_DEFINE(HAVE_BOOST_UNORDERED_MAP, 1,
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[if the compiler has boost::unordered_map])
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AC_DEFINE(HAVE_BOOST_UNORDERED_SET, 1,
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[if the compiler has boost::unordered_set])
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pandora_has_unordered=yes
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AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
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AC_MSG_WARN([could not find an STL unordered_map])
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AC_DEFUN([PANDORA_HAVE_CXX_UNORDERED],[
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AC_REQUIRE([PANDORA_CXX_STL_UNORDERED])
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AC_DEFUN([PANDORA_REQUIRE_CXX_UNORDERED],[
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AC_REQUIRE([PANDORA_HAVE_CXX_UNORDERED])
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AS_IF([test "x${pandora_has_unordered}" != "xyes"],[
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AC_MSG_ERROR([An STL compliant unordered_map is required for ${PACKAGE}.
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Implementations can be found in Recent versions of gcc and in boost])
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# We check two things: where the include file is for hash_map, and
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# what namespace hash_map lives in within that include file. We
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# include AC_TRY_COMPILE for all the combinations we've seen in the
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# wild. We define one of HAVE_HASH_MAP or HAVE_EXT_HASH_MAP depending
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# on location, and HASH_NAMESPACE to be the namespace hash_map is
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# Ideally we'd use AC_CACHE_CHECK, but that only lets us store one value
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# at a time, and we need to store two (filename and namespace).
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# prints messages itself, so we have to do the message-printing ourselves
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# via AC_MSG_CHECKING + AC_MSG_RESULT. (TODO(csilvers): can we cache?)
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AC_DEFUN([AC_CXX_STL_HASH],
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[AC_MSG_CHECKING(the location of hash_map)
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for location in ext/hash_map boost/hash_map hash_map; do
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for namespace in __gnu_cxx "" std stdext; do
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if test -z "$ac_cv_cxx_hash_map"; then
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AC_TRY_COMPILE([#include <$location>],
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[${namespace}::hash_map<int, int> t],
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[ac_cv_cxx_hash_map="<$location>";
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ac_cv_cxx_hash_namespace="$namespace";])
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ac_cv_cxx_hash_set=`echo "$ac_cv_cxx_hash_map" | sed s/map/set/`;
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if test -n "$ac_cv_cxx_hash_map"; then
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AC_DEFINE(HAVE_HASH_MAP, 1, [define if the compiler has hash_map])
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AC_DEFINE(HAVE_HASH_SET, 1, [define if the compiler has hash_set])
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AC_DEFINE_UNQUOTED(HASH_MAP_H,$ac_cv_cxx_hash_map,
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[the location of <hash_map>])
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AC_DEFINE_UNQUOTED(HASH_SET_H,$ac_cv_cxx_hash_set,
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[the location of <hash_set>])
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AC_DEFINE_UNQUOTED(HASH_NAMESPACE,$ac_cv_cxx_hash_namespace,
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[the namespace of hash_map/hash_set])
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AC_MSG_RESULT([$ac_cv_cxx_hash_map])
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AC_MSG_WARN([could not find an STL hash_map])