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61 lines
2.2 KiB
Plaintext
61 lines
2.2 KiB
Plaintext
# 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_PUSH([C++])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#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; ]])],[ac_cv_cxx_have_std_ext_hash_set=yes],[ac_cv_cxx_have_std_ext_hash_set=no])
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AC_LANG_POP([C++])])
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if test "$ac_cv_cxx_have_std_ext_hash_set" = yes
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then
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AC_DEFINE(HAVE_STD_EXT_HASH_SET,1,[Have hash_set in std namespace])
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else
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AC_DEFINE(HAVE_STD_EXT_HASH_SET,0,[Does not have hash_set in std namespace])
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fi
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])
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AC_DEFUN([AC_CXX_HAVE_GNU_EXT_HASH_SET],
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[AC_CACHE_CHECK(
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[whether the compiler has <ext/hash_set> defining template class __gnu_cxx::hash_set],
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ac_cv_cxx_have_gnu_ext_hash_set,
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[AC_REQUIRE([AC_CXX_NAMESPACES])
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AC_LANG_PUSH([C++])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <ext/hash_set>
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#ifdef HAVE_NAMESPACES
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using namespace __gnu_cxx;
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#endif]], [[hash_set<int> t; ]])],[ac_cv_cxx_have_gnu_ext_hash_set=yes],[ac_cv_cxx_have_gnu_ext_hash_set=no])
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AC_LANG_POP([C++])])
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if test "$ac_cv_cxx_have_gnu_ext_hash_set" = yes
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then
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AC_DEFINE(HAVE_GNU_EXT_HASH_SET,1,[Have hash_set in gnu namespace])
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else
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AC_DEFINE(HAVE_GNU_EXT_HASH_SET,0,[Does not have hash_set in gnu namespace])
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fi
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])
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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_PUSH([C++])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <hash_set>]], [[hash_set<int> t; return 0;]])],[ac_cv_cxx_have_global_hash_set=yes],[ac_cv_cxx_have_global_hash_set=no])
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AC_LANG_POP([C++])])
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if test "$ac_cv_cxx_have_global_hash_set" = yes
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then
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AC_DEFINE(HAVE_GLOBAL_HASH_SET,1,[Have hash_set in global namespace])
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else
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AC_DEFINE(HAVE_GLOBAL_HASH_SET,0,[Does not have hash_set in global namespace])
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fi
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])
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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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