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24 lines
699 B
Plaintext
24 lines
699 B
Plaintext
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#
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# Check for bidirectional iterator 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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#
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AC_DEFUN([AC_CXX_HAVE_BI_ITERATOR],
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[AC_CACHE_CHECK(whether the compiler has the bidirectional iterator,
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ac_cv_cxx_have_bi_iterator,
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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 <iterator>
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#ifdef HAVE_NAMESPACES
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using namespace std;
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#endif],[bidirectional_iterator<int,int> t; return 0;],
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ac_cv_cxx_have_bi_iterator=yes, ac_cv_cxx_have_bi_iterator=no)
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AC_LANG_RESTORE
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])
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HAVE_BI_ITERATOR=0
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if test "$ac_cv_cxx_have_bi_iterator" = yes
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then
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HAVE_BI_ITERATOR=1
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fi
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AC_SUBST(HAVE_BI_ITERATOR)])
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