61 lines
2.8 KiB
Plaintext
61 lines
2.8 KiB
Plaintext
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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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# defined in.
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#
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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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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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ac_cv_cxx_hash_map_header=""
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ac_cv_cxx_hash_map_class=""
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for location in [tr1/unordered_map ext/hash_map hash_map]; do
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for namespace in [std::tr1 __gnu_cxx "" std stdext]; do
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for name in [unordered_map hash_map]; do
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if test -z "$ac_cv_cxx_hash_map_header"; then
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# On OSX 1.5 / GCC 4.0.1 (the standard compiler on that platform),
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# calling find() on a const unordered_map does not compile. So, we
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# include a call to find() in our test to detect this broken
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# implementation and avoid using it. Note that ext/hash_map works
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# fine on this platform, so we'll end up using that.
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AC_TRY_COMPILE([#include <$location>],
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[const ${namespace}::$name<int, int> t;
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t.find(1);],
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[ac_cv_cxx_hash_map_header="<$location>";
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ac_cv_cxx_hash_namespace="$namespace";
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ac_cv_cxx_hash_map_class="$name";])
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fi
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done
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done
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done
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ac_cv_cxx_hash_set_header=`echo "$ac_cv_cxx_hash_map_header" | sed s/map/set/`;
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ac_cv_cxx_hash_set_class=`echo "$ac_cv_cxx_hash_map_class" | sed s/map/set/`;
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if test -n "$ac_cv_cxx_hash_map_header"; 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,$ac_cv_cxx_hash_map_header,
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[the location of <hash_map>])
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AC_DEFINE_UNQUOTED(HASH_SET_H,$ac_cv_cxx_hash_set_header,
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[the location of <hash_set>])
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AC_DEFINE_UNQUOTED(HASH_MAP_CLASS,$ac_cv_cxx_hash_map_class,
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[the name of <hash_set>])
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AC_DEFINE_UNQUOTED(HASH_SET_CLASS,$ac_cv_cxx_hash_set_class,
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[the name 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_header])
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else
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AC_MSG_RESULT()
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AC_MSG_WARN([could not find an STL hash_map])
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fi
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])
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