diff options
Diffstat (limited to 'autoconf/m4/cxx_bidi_iterator.m4')
| -rw-r--r-- | autoconf/m4/cxx_bidi_iterator.m4 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/autoconf/m4/cxx_bidi_iterator.m4 b/autoconf/m4/cxx_bidi_iterator.m4 new file mode 100644 index 000000000000..d7de85630b5f --- /dev/null +++ b/autoconf/m4/cxx_bidi_iterator.m4 @@ -0,0 +1,22 @@ +# +# Check for bidirectional iterator extension. This is modified from +# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_hash_set.html +# +AC_DEFUN([AC_CXX_HAVE_BI_ITERATOR], +[AC_CACHE_CHECK(whether the compiler has the bidirectional iterator, +ac_cv_cxx_have_bi_iterator, +[AC_REQUIRE([AC_CXX_NAMESPACES]) + AC_LANG_PUSH([C++]) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <iterator> +#ifdef HAVE_NAMESPACES +using namespace std; +#endif]], [[bidirectional_iterator<int,int> t; return 0;]])],[ac_cv_cxx_have_bi_iterator=yes],[ac_cv_cxx_have_bi_iterator=no]) + AC_LANG_POP([C++]) +]) +if test "$ac_cv_cxx_have_bi_iterator" = yes +then + AC_DEFINE(HAVE_BI_ITERATOR,1,[Have bi-directional iterator]) +else + AC_DEFINE(HAVE_BI_ITERATOR,0,[Does not have bi-directional iterator]) +fi +]) |