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# ===========================================================================
# http://autoconf-archive.cryp.to/ac_cxx_gnucxx_hashmap.html
# ===========================================================================
#
# SYNOPSIS
#
# AC_CXX_GNUCXX_HASHMAP
#
# DESCRIPTION
#
# Test for the presence of GCC's hashmap STL extension.
#
# LICENSE
#
# Copyright (c) 2008 Patrick Mauritz <oxygene@studentenbude.ath.cx>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved.
AC_DEFUN([AC_CXX_GNUCXX_HASHMAP],[
AC_CACHE_CHECK(whether the compiler supports __gnu_cxx::hash_map,
ac_cv_cxx_gnucxx_hashmap,
[AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <ext/hash_map>
using __gnu_cxx::hash_map;],
[],
ac_cv_cxx_gnucxx_hashmap=yes, ac_cv_cxx_gnucxx_hashmap=no)
AC_LANG_RESTORE
])
if test "$ac_cv_cxx_gnucxx_hashmap" = yes; then
AC_DEFINE(HAVE_GNUCXX_HASHMAP,,[define if the compiler supports __gnu_cxx::hash_map])
fi
])
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