Add warning message if cl test prog fails for cygwin targets

git-svn-id: svn://10.0.0.236/trunk@113551 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/configure.in

@@ -150,6 +150,8 @@ case "$target" in
         cl -o dummy dummy.c >/dev/null 2>&1
         if test $? = 0; then
             _WIN32_MSVC=1
+        else
+            AC_MSG_WARN([cl.exe test failed.  Using normal feature tests])
         fi
         rm -f dummy dummy.o dummy.obj dummy.exe dummy.c
     fi