Hi all<div>&nbsp; &nbsp; &nbsp; &nbsp;I want to compile a kernel module.The source code file ,written by native skin, prepared to compile is named &quot;kernel-test.c&quot;.The comment of makefile is described as follows£º</div><div>&nbsp; &nbsp; &nbsp;&nbsp;<span class="Apple-tab-span" style="white-space:pre">	</span>ifneq ($(KERNELRELEASE),)</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>obj-m :=kernel-test.o</div><div>else</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>KSRC ?=/usr/src/xenomai/linux-2.6.31.8</div><div>
<span class="Apple-tab-span" style="white-space:pre">	</span>PWD &nbsp; &nbsp; :=$(shell pwd)</div><div>default:</div><div><span class="Apple-tab-span" style="white-space:pre">	</span>$(MAKE) -C &nbsp;$(KSRC) &nbsp; &nbsp;M=$(PWD) &nbsp; &nbsp; &nbsp; &nbsp;modules</div>
<div>endif</div><div>&nbsp; &nbsp; &nbsp; &nbsp; I tried to compile kernel module.Then I got:</div><div><div>make -I/usr/xenomai/include/ &nbsp;ARCH=arm CROSS_COMPILE=arm-linux-</div><div>make -C &nbsp;/usr/src/xenomai/linux-2.6.31.8 &nbsp; &nbsp;M=/home/zhengyi/xenomai-program/kernel &nbsp; &nbsp; &nbsp; &nbsp;modules</div>
<div>make[1]: Entering directory `/usr/src/xenomai/linux-2.6.31.8&#39;</div><div>&nbsp; CC [M] &nbsp;/home/zhengyi/xenomai-program/kernel/kernel-test.o</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:1:25: native/task.h: No such file or directory</div>
<div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:5: error: parse error before &quot;task_desc&quot;</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:5: warning: type defaults to `int&#39; in declaration of `task_desc&#39;</div>
<div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:5: warning: data definition has no type or storage class</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c: In function `task_body&#39;:</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:9: error: implicit declaration of function `printk&#39;</div>
<div>/home/zhengyi/xenomai-program/kernel/kernel-test.c: In function `init_module&#39;:</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:17: error: implicit declaration of function `rt_task_create&#39;</div><div>
/home/zhengyi/xenomai-program/kernel/kernel-test.c:21: error: `T_FPU&#39; undeclared (first use in this function)</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:21: error: (Each undeclared identifier is reported only once</div>
<div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:21: error: for each function it appears in.)</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:21: error: implicit declaration of function `T_CPU&#39;</div>
<div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:23: error: implicit declaration of function `rt_task_start&#39;</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:23: error: `NULL&#39; undeclared (first use in this function)</div>
<div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:24: error: implicit declaration of function `pause&#39;</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c: In function `cleanup_module&#39;:</div><div>/home/zhengyi/xenomai-program/kernel/kernel-test.c:29: error: implicit declaration of function `rt_task_delete&#39;</div>
<div>make[2]: *** [/home/zhengyi/xenomai-program/kernel/kernel-test.o] error 1</div><div>make[1]: *** [_module_/home/zhengyi/xenomai-program/kernel] error 2</div><div>make[1]: Leaving directory `/usr/src/xenomai/linux-2.6.31.8&#39;</div>
<div>make: *** [default] error 2</div></div><div><br></div><div>It seems that my problem is caused by &nbsp;Xenomai head file directory.How to solve my proble?Thank you.</div><div>regards</div><div>yizheng</div>