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POHow to compile a kernel module for Raspberry pi?
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  1. POHow to compile a kernel module for Raspberry pi?
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    copied!<p>I'm having trouble compiling a kernel module for a raspberry pi. I want to compile a "hello world" kernel module using the raspberry pi itself.</p> <p>I am using raspbian wheezy 3.6.11+.</p> <p>I tried following the directions at <a href="http://elinux.org/RPi_Kernel_Compilation">http://elinux.org/RPi_Kernel_Compilation</a>.</p> <p>Here is the Makefile I am using:</p> <pre><code>obj-m += hello-1.o all: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules clean: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean </code></pre> <p>Here is the source code for hello-1.c:</p> <pre><code>/* * hello-1.c - The simplest kernel module. */ #include &lt;linux/module.h&gt; /* Needed by all modules */ #include &lt;linux/kernel.h&gt; /* Needed for KERN_INFO */ int init_module(void) { printk(KERN_INFO "Hello world 1.\n"); /* * A non 0 return means init_module failed; module can't be loaded. */ return 0; } void cleanup_module(void) { printk(KERN_INFO "Goodbye world 1.\n"); } </code></pre> <p>Here's what I get when I try to make the project:</p> <pre><code>root@raspberrypi:/home/pi/hello-module# make make -C /lib/modules/3.6.11+/build M=/home/pi/hello-module modules make: *** /lib/modules/3.6.11+/build: No such file or directory. Stop. make: *** [all] Error 2 </code></pre> <p>I tried creating the build directory at /lib/modules/3.6.11+</p> <pre><code>make -C /lib/modules/3.6.11+/build M=/home/pi/hello-module modules make[1]: Entering directory `/lib/modules/3.6.11+/build' make[1]: *** No rule to make target `modules'. Stop. make[1]: Leaving directory `/lib/modules/3.6.11+/build' make: *** [all] Error 2 </code></pre> <p>I have GNU Make 3.81 and gcc (Debian 4.6.3-14+rpi1) 4.6.3 installed. I also installed the linux source using </p> <blockquote> <p>sudo apt-get install linux-source</p> </blockquote> <p>Any ideas on what I might do to get this to compile?</p>
 

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