You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
3.3 KiB
72 lines
3.3 KiB
# 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. We define HAVE_UNORDERED_MAP if the class we found |
|
# is named unordered_map, or leave it undefined if not. |
|
|
|
# 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 |
|
]) |
|
|
|
|