如何交叉编译Microwindows for ARM arch

对Microwindows的交叉编译有一些问题 . 以下是我的步骤：0 . 下载交叉编译工具链

wget http://www.codesourcery.com/sgpp/lite/arm/portal/package5383/public/arm-none-linux-gnueabi/arm-2009q3-67-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
    sudo mkdir –p /opt/toolchain
    sudo cp arm-2009q3-67-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2 /opt/toolchain
    cd /opt/toolchain
    sudo tar –jxvf arm-2009q3-67-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
    export PATH=/opt/toolchain/arm-2009q3/bin:$PATH

• 下载Microwindows的最新版本（v . 0.92）

cd ~
    wget ftp://microwindows.censoft.com/pub/microwindows/microwindows-full-0.92.tar.gz
        tar xvf microwindows-full-0.92.tar.gz

• 预配置：安装下一个包：

sudo apt-get install libjpeg-dev libpng-dev python-dev libfreetype6-dev

• 编辑ARM体系结构的配置文件

cd microwindows-0.92/src
    nano config

编辑下一行：

ARCH                     = LINUX-ARM
ARMTOOLSPREFIX           = arm-none-linux-gnueabi-  
INCJPEG                  = /usr/include/
INCPNG                   = /usr/include/
INCZ                     = /usr/include/
INCTIFF                  = /usr/include/
LIBFT2LIB                = /usr/lib/libfreetype.a

• 运行make

之后我有下一条消息：

cc1: warning: include location "/usr/include/" is unsafe for cross-compilation
    cc1: warning: include location "/usr/include/freetype2" is unsafe for cross-compilation
    In file included from /home/user/microwindows-0.92/src/include/windows.h:19,
                     from /home/user/microwindows-0.92/src/mwin/winmain.c:44:
    /home/user/microwindows-0.92/src/include/windef.h:131: warning: function declaration isn't a prototype
    /home/user/microwindows-0.92/src/include/windef.h:132: warning: function declaration isn't a prototype
    /home/user/microwindows-0.92/src/include/windef.h:133: warning: function declaration isn't a prototype
    /home/user/microwindows-0.92/src/mwin/winmain.c: In function 'MwSelect':
    /home/user/microwindows-0.92/src/mwin/winmain.c:356: error: impossible constraint in 'asm'
    /home/user/microwindows-0.92/src/mwin/winmain.c:357: error: impossible constraint in 'asm'
    /home/user/microwindows-0.92/src/mwin/winmain.c:358: error: impossible constraint in 'asm'
    make[1]: *** [/home/user/microwindows-0.92/src/obj/mwin/winmain.o] Error 1
    make: *** [subdir-/home/user/microwindows-0.92/src/mwin] Error 2

什么是争吵？我怎么解决它？