Bring the script out of the dark ages and into modern autoconfness.

[oota-llvm.git] / autoconf / m4 / cxx_bidi_iterator.m4

diff --git a/autoconf/m4/cxx_bidi_iterator.m4 b/autoconf/m4/cxx_bidi_iterator.m4
index e16976d389ea3e639965cdcfed4696698118ff2e..959d4fc22471f6237822e5fa3419127dd9503e15 100644 (file)
--- a/autoconf/m4/cxx_bidi_iterator.m4
+++ b/autoconf/m4/cxx_bidi_iterator.m4
@@ -6,14 +6,12 @@ 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_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],[bidirectional_iterator<int,int> t; return 0;],
-  ac_cv_cxx_have_bi_iterator=yes, ac_cv_cxx_have_bi_iterator=no)
-  AC_LANG_RESTORE
+#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++])
 ])
 HAVE_BI_ITERATOR=0
 if test "$ac_cv_cxx_have_bi_iterator" = yes