See the scripts/Makefile.build.
first line is src := $(obj)
So src = arch/mips/kernel
# The filename Kbuild has precedence over Makefile
kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
kbuild-file := $(if $(wildcard
$(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
include $(kbuild-file.
...
# Built-in and composite module parts
$(obj)/%.o: $(src)/%.c FORCE
$(call cmd,force_checksrc)
$(call if_changed_rule,cc_o_c)
AFAIK,i think the details in the scripts/Makefile.build and it is the
common makefile.
2009/2/28 Peter Teoh <htmldeveloper@xxxxxxxxx>:
> i think u are asking how does Makefile works. I only understand some
> aspect of it...not its entirety....which can be very powerful and
> complex....suficient to generate my modules and integrate with the
> rest of kernel.
>
> http://www-subatech.in2p3.fr/~photons/subatech/soft/srt/html/c2470.html
> http://www.cs.duke.edu/~ola/courses/programming/Makefiles/node1.html
> http://sunsite.ualberta.ca/Documentation/Gnu/make-3.79/html_chapter/make_3.html
>
> for all practical purposes, it is better to just take an existing
> sample, and work from there....which means u have to spent some time
> finding a good sample on the Internet......instead of spending time
> learning all the details and write one of your own....my 2cts....
>
> On Fri, Feb 27, 2009 at 2:42 AM, MEHMET ALI EKICI
> <mehmet.ekici@xxxxxxxxxxxxxx> wrote:
>> Hi Peter,
>> I also wonder much how build system works. I read the kbuild
>> documentation but it is not clear to me.
>> Would you please give us some guidence about algotihmic work of build
>> system?
>> Makefile includes xxx file, the xxx file defines such parameters it
>> then includes yyyy file etc.
>> I hope it would not be too boring to you ?
>>
>> Thanks,
>
> --
> Regards,
> Peter Teoh
>
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