21 lines
672 B
Plaintext
21 lines
672 B
Plaintext
dnl Available from the GNU Autoconf Macro Archive at:
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dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_hash_set.html
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dnl
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AC_DEFUN([AC_CXX_HAVE_EXT_HASH_SET],
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[AC_CACHE_CHECK(whether the compiler has ext/hash_set,
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ac_cv_cxx_have_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; return 0;],
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ac_cv_cxx_have_ext_hash_set=yes, ac_cv_cxx_have_ext_hash_set=no)
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AC_LANG_RESTORE
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])
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if test "$ac_cv_cxx_have_ext_hash_set" = yes; then
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AC_DEFINE(HAVE_EXT_HASH_SET,,[define if the compiler has ext/hash_set])
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fi
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])
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