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64 lines
2.0 KiB
Plaintext
64 lines
2.0 KiB
Plaintext
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# Check for hash_set extension. This is modified from
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# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_hash_set.html
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AC_DEFUN([AC_CXX_HAVE_STD_EXT_HASH_SET],
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[AC_CACHE_CHECK([whether the compiler has <ext/hash_set> defining template class std::hash_set],
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ac_cv_cxx_have_std_ext_hash_set,
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[AC_REQUIRE([AC_CXX_NAMESPACES])
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([#include <ext/hash_set>
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#ifdef HAVE_NAMESPACES
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using namespace std;
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#endif],[hash_set<int> t; ],
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[ac_cv_cxx_have_std_ext_hash_set=yes], [ac_cv_cxx_have_std_ext_hash_set=no])
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AC_LANG_RESTORE])
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HAVE_STD_EXT_HASH_SET=0
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if test "$ac_cv_cxx_have_std_ext_hash_set" = yes
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then
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HAVE_STD_EXT_HASH_SET=1
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fi
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AC_SUBST(HAVE_STD_EXT_HASH_SET)])
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AC_DEFUN([AC_CXX_HAVE_GNU_EXT_HASH_SET],
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[AC_CACHE_CHECK(
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[whether the compiler has <ext/hash_set> defining template class __gnu_cxx::hash_set],
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ac_cv_cxx_have_gnu_ext_hash_set,
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[AC_REQUIRE([AC_CXX_NAMESPACES])
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([#include <ext/hash_set>
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#ifdef HAVE_NAMESPACES
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using namespace __gnu_cxx;
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#endif],[hash_set<int> t; ],
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[ac_cv_cxx_have_gnu_ext_hash_set=yes], [ac_cv_cxx_have_gnu_ext_hash_set=no])
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AC_LANG_RESTORE])
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HAVE_GNU_EXT_HASH_SET=0
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if test "$ac_cv_cxx_have_gnu_ext_hash_set" = yes
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then
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HAVE_GNU_EXT_HASH_SET=1
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fi
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AC_SUBST(HAVE_GNU_EXT_HASH_SET)])
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AC_DEFUN([AC_CXX_HAVE_GLOBAL_HASH_SET],
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[AC_CACHE_CHECK([whether the compiler has <hash_set> defining template class ::hash_set],
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ac_cv_cxx_have_global_hash_set,
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[AC_REQUIRE([AC_CXX_NAMESPACES])
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_COMPILE([#include <hash_set>],[hash_set<int> t; return 0;],
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[ac_cv_cxx_have_global_hash_set=yes], [ac_cv_cxx_have_global_hash_set=no])
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AC_LANG_RESTORE])
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HAVE_GLOBAL_HASH_SET=0
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if test "$ac_cv_cxx_have_global_hash_set" = yes
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then
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HAVE_GLOBAL_HASH_SET=1
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fi
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AC_SUBST(HAVE_GLOBAL_HASH_SET)])
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AC_DEFUN([AC_CXX_HAVE_HASH_SET],
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[AC_CXX_HAVE_STD_EXT_HASH_SET
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AC_CXX_HAVE_GNU_EXT_HASH_SET
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AC_CXX_HAVE_GLOBAL_HASH_SET])
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