756
Comment: new entry in the FAQ : howto compile a kernel module
|
1060
converted to 1.6 markup
|
Deletions are marked like this. | Additions are marked like this. |
Line 3: | Line 3: |
You have to write a Makefile. The Makefile is a standard one and depends on the kernel version. | You have to write a Makefile. The Makefile is a standard one and depends on the kernel version. Do not try to make your own Makefile, use the Linux kernel infrastructure, as explained below. |
Line 16: | Line 16: |
For more informations, see [[http://lwn.net/images/pdf/LDD3/ch02.pdf|Linux Device Drivers, Building and Running Modules]], and [[http://lwn.net/Articles/21823/|Driver porting: compiling external modules]]. |
How do I compile a Linux kernel module?
You have to write a Makefile. The Makefile is a standard one and depends on the kernel version. Do not try to make your own Makefile, use the Linux kernel infrastructure, as explained below.
Standard Makefile for 2.6 kernels
obj-m := name_of_module.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
For more informations, see Linux Device Drivers, Building and Running Modules, and Driver porting: compiling external modules.
Standard Makefile for 2.4 (and <=) kernels
TARGET := module_name INCLUDE := -I/lib/modules/`uname -r`/build/include CFLAGS := -O2 -Wall -DMODULE -D__KERNEL__ -DLINUX CC := gcc ${TARGET}.o: ${TARGET}.c $(CC) $(CFLAGS) ${INCLUDE} -c ${TARGET}.c
Once the module is compiled, you can load it with the following command :
insmod module.[ko|o]