Bring the script out of the dark ages and into modern autoconfness.
llvm-svn: 16415
diff --git a/llvm/autoconf/m4/cxx_fwd_iterator.m4 b/llvm/autoconf/m4/cxx_fwd_iterator.m4
index 8da2944..73711b5 100644
--- a/llvm/autoconf/m4/cxx_fwd_iterator.m4
+++ b/llvm/autoconf/m4/cxx_fwd_iterator.m4
@@ -4,14 +4,12 @@
[AC_CACHE_CHECK(whether the compiler has forward iterators,
ac_cv_cxx_have_fwd_iterator,
[AC_REQUIRE([AC_CXX_NAMESPACES])
- AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- AC_TRY_COMPILE([#include <iterator>
+ AC_LANG_PUSH([C++])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <iterator>
#ifdef HAVE_NAMESPACES
using namespace std;
-#endif],[forward_iterator<int,int> t; return 0;],
- ac_cv_cxx_have_fwd_iterator=yes, ac_cv_cxx_have_fwd_iterator=no)
- AC_LANG_RESTORE
+#endif]], [[forward_iterator<int,int> t; return 0;]])],[ac_cv_cxx_have_fwd_iterator=yes],[ac_cv_cxx_have_fwd_iterator=no])
+ AC_LANG_POP([C++])
])
HAVE_FWD_ITERATOR=0
if test "$ac_cv_cxx_have_fwd_iterator" = yes