X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/209ea708c46245d853b73ca32c0c96375ae40b9f..927b425baae16fc1d50e092b78b944e281b521f6:/m4/cxx.m4

diff --git a/m4/cxx.m4 b/m4/cxx.m4
index 1d17e836..a63593f2 100644
--- a/m4/cxx.m4
+++ b/m4/cxx.m4
@@ -1,7 +1,7 @@
 # -*- Autoconf -*-
 # Sanity-test a C++ compiler.
 #
-# Copyright (C) 2004 Free Software Foundation, Inc.
+# Copyright (C) 2004, 2006 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -15,10 +15,10 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307  USA
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301  USA
 
-# Written by Paul Eggert <eggert@cs.ucla.edu>.
+# Written by Paul Eggert.
 
 AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER],
 [
@@ -27,9 +27,20 @@ AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER],
    [AC_LANG_PUSH([C++])
     AC_RUN_IFELSE(
       [AC_LANG_PROGRAM(
-	 [#include <iostream>
+	 [#include <cstdlib>
+	  #include <iostream>
+	  #include <map>
+	  #include <string>
 	  using namespace std;],
-         [cout << "";])],
+         [std::cerr << "";
+          cout << "";
+	  typedef std::pair<unsigned int, int> uipair;
+	  std::map<unsigned int, int> m;
+	  std::map<unsigned int, int>::iterator i;
+	  m.insert (uipair (4, -4));
+	  for (i = m.begin (); i != m.end (); ++i)
+	    if (i->first != 4)
+	      return 1;])],
       [bison_cv_cxx_works=yes],
       [bison_cv_cxx_works=no],
       [bison_cv_cxx_works=cross])
@@ -43,4 +54,5 @@ AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER],
  esac
 
  AC_SUBST([BISON_CXX_WORKS])
+ AM_CONDITIONAL(BISON_CXX_WORKS, test $bison_cv_cxx_works = yes)
 ])