How can I use macro outl in nios2 uclinux?

Hi,

I use NiosII IDE.

I add "-D__KERNEL__ " to CFLAGS += in my makefile. cope the nios2_system.h to the project.When build the target, the errors like follows:

in inclusion d:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/include/linux/config.h:4[d:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/include/linux/linkage.h] mult line 4 May 7, 2006 8:27:23 PM

linux/autoconf.h: No such file or directory[d:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/include/linux/config.h] mult line 4 May 7, 2006 8:27:23 PM

nios2_system.h: No such file or directory[d:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/include/asm/nios.h] mult line 4 May 7, 2006 8:27:23 PM

in inclusion d:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/include/linux/linkage.h:4:[d:/altera/kits/nios2/bin/eclipse/plugins/com.microtronix.nios2linux.uClibc_1.4.0/include/linux/kernel.h] mult line 11 May 7, 2006 8:27:23 PM

If comment the# includd <asm/io.h>, all the errors like above disappeared .

What is wrong ? Please give me help?Thank you very much!!