Make menuconfig, kconfig, makefile,. config, and find out the relationships between the four.

Make menuconfig

ARCH/ARM/mach-s3c2440/kconfig

ARCH/ARM/mach-s3c2440/makefile

. Config

Kconfig is the content source in menuconfig. If a certain item is selected in menuconfig, it will be reflected in. config. In makefile, a specific item is determined based on the option.

If I want to compile ARCH/ARM/mach-s3c2440/mach-mini2440.c into the kernel now, first add its option in kconfig

Config mach_mini2440

Bool "mini2440 Development Board"

.

.

More information is not listed. Then make menuconfig in

System type --->

S3C2440 machines --->

[*] Mini2440 Development Board

If this option is selected, it will appear in the. config file at the top level.

Config_mach_mini2440 = y

In makefile, add

OBJ-$ (config_mach_mini2440) + = mach-2440.o

In this way, when makefile reads. config again, it is found that config_mach_mini2440 is Y and the mach-2440.c will be compiled in.

This process is relatively clear, if you have written a c file for your own Development Board in arch/ARM/mach-s3c2440/, yourboard. C, you can put the makefile in the directory

OBJ-$ (config_mach_mini2440) + = mach-2440.o changed

OBJ-$ (config_mach_mini2440) + = yourboard. o

Here it is to copy the mach-smdk2440.c into a gml-2440.c while the obj-$ (config_mach_mini2440) + = gml-2440.o

Modify the clock frequency and comment out smdk_machine_init ().

From: http://hi.baidu.com/rqm3000/blog/item/59f0d397f80da27e54fb96a1.html