diff options
Diffstat (limited to 'm4/stl_hash.m4')
-rw-r--r-- | m4/stl_hash.m4 | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/m4/stl_hash.m4 b/m4/stl_hash.m4 deleted file mode 100644 index d7def1af..00000000 --- a/m4/stl_hash.m4 +++ /dev/null @@ -1,71 +0,0 @@ -# We check two things: where the include file is for -# unordered_map/hash_map (we prefer the first form), and what -# namespace unordered/hash_map lives in within that include file. We -# include AC_TRY_COMPILE for all the combinations we've seen in the -# wild. We define HASH_MAP_H to the location of the header file, and -# HASH_NAMESPACE to the namespace the class (unordered_map or -# hash_map) is in. - -# This also checks if unordered map exists. -AC_DEFUN([AC_CXX_STL_HASH], - [ - AC_MSG_CHECKING(the location of hash_map) - AC_LANG_SAVE - AC_LANG_CPLUSPLUS - ac_cv_cxx_hash_map="" - # First try unordered_map, but not on gcc's before 4.2 -- I've - # seen unexplainable unordered_map bugs with -O2 on older gcc's. - AC_TRY_COMPILE([#if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)) - # error GCC too old for unordered_map - #endif - ], - [/* no program body necessary */], - [stl_hash_old_gcc=no], - [stl_hash_old_gcc=yes]) - for location in unordered_map tr1/unordered_map; do - for namespace in std std::tr1; do - if test -z "$ac_cv_cxx_hash_map" -a "$stl_hash_old_gcc" != yes; then - # Some older gcc's have a buggy tr1, so test a bit of code. - AC_TRY_COMPILE([#include <$location>], - [const ${namespace}::unordered_map<int, int> t; - return t.find(5) == t.end();], - [ac_cv_cxx_hash_map="<$location>"; - ac_cv_cxx_hash_namespace="$namespace"; - ac_cv_cxx_hash_map_class="unordered_map";]) - fi - done - done - # Now try hash_map - for location in ext/hash_map hash_map; do - for namespace in __gnu_cxx "" std stdext; do - if test -z "$ac_cv_cxx_hash_map"; then - AC_TRY_COMPILE([#include <$location>], - [${namespace}::hash_map<int, int> t], - [ac_cv_cxx_hash_map="<$location>"; - ac_cv_cxx_hash_namespace="$namespace"; - ac_cv_cxx_hash_map_class="hash_map";]) - fi - done - done - ac_cv_cxx_hash_set=`echo "$ac_cv_cxx_hash_map" | sed s/map/set/`; - ac_cv_cxx_hash_set_class=`echo "$ac_cv_cxx_hash_map_class" | sed s/map/set/`; - if test -n "$ac_cv_cxx_hash_map"; then - AC_DEFINE(HAVE_HASH_MAP, 1, [define if the compiler has hash_map]) - AC_DEFINE(HAVE_HASH_SET, 1, [define if the compiler has hash_set]) - AC_DEFINE_UNQUOTED(HASH_MAP_H,$ac_cv_cxx_hash_map, - [the location of <unordered_map> or <hash_map>]) - AC_DEFINE_UNQUOTED(HASH_SET_H,$ac_cv_cxx_hash_set, - [the location of <unordered_set> or <hash_set>]) - AC_DEFINE_UNQUOTED(HASH_NAMESPACE,$ac_cv_cxx_hash_namespace, - [the namespace of hash_map/hash_set]) - AC_DEFINE_UNQUOTED(HASH_MAP_CLASS,$ac_cv_cxx_hash_map_class, - [the name of <hash_map>]) - AC_DEFINE_UNQUOTED(HASH_SET_CLASS,$ac_cv_cxx_hash_set_class, - [the name of <hash_set>]) - AC_MSG_RESULT([$ac_cv_cxx_hash_map]) - else - AC_MSG_RESULT() - AC_MSG_WARN([could not find an STL hash_map]) - fi -]) - |