have_header: checking for windows.h... -------------------- yes

"cl -I. -Ie:/ruby/lib/ruby/1.8/i386-mswin32  -MD -Zi -O2b2xg- -G6  conftest.c -P"
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.42 for 80x86
Copyright (C) Microsoft Corporation.  All rights reserved.

cl : Command line warning D9035 : option 'Og-' has been deprecated and will be removed in a future release
cl : Command line warning D9002 : ignoring unknown option '-G6'
conftest.c
checked program was:
/* begin */
#include <windows.h>
/* end */

--------------------