X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d9735e9e3e09c94b05e5b81e86cce6c7f7cf72af..70afaf26037e919f6abf3904e43845d116899df3:/m4/cxx.m4?ds=inline

diff --git a/m4/cxx.m4 b/m4/cxx.m4
index a63593f2..3d5f400e 100644
--- a/m4/cxx.m4
+++ b/m4/cxx.m4
@@ -1,11 +1,11 @@
 # -*- Autoconf -*-
 # Sanity-test a C++ compiler.
 #
-# Copyright (C) 2004, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2004, 2006, 2009 Free Software Foundation, Inc.
 #
-# This program is free software; you can redistribute it and/or modify
+# 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
-# the Free Software Foundation; either version 2 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This program is distributed in the hope that it will be useful,
@@ -14,9 +14,7 @@
 # GNU General Public License for more details.
 #
 # 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., 51 Franklin Street, Fifth Floor, Boston, MA
-# 02110-1301  USA
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Written by Paul Eggert.
 
@@ -25,7 +23,8 @@ AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER],
  AC_CACHE_CHECK([whether $CXX builds executables that work],
    bison_cv_cxx_works,
    [AC_LANG_PUSH([C++])
-    AC_RUN_IFELSE(
+    bison_cv_cxx_works=no
+    AC_COMPILE_IFELSE(
       [AC_LANG_PROGRAM(
 	 [#include <cstdlib>
 	  #include <iostream>
@@ -41,9 +40,12 @@ AC_DEFUN([BISON_TEST_FOR_WORKING_CXX_COMPILER],
 	  for (i = m.begin (); i != m.end (); ++i)
 	    if (i->first != 4)
 	      return 1;])],
-      [bison_cv_cxx_works=yes],
-      [bison_cv_cxx_works=no],
-      [bison_cv_cxx_works=cross])
+      [AS_IF([AC_TRY_COMMAND([$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_objext $LIBS >&AS_MESSAGE_LOG_FD])],
+	 [AS_IF([test "$cross_compiling" = yes],
+	    [bison_cv_cxx_works=cross],
+	    [AS_IF([AC_TRY_COMMAND(./conftest$ac_exeext)],
+	       [bison_cv_cxx_works=yes])])])
+       rm -f conftest$ac_exeext])
     AC_LANG_POP([C++])])
 
  case $bison_cv_cxx_works in