Re: kbuild - two obj's from one source

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On 12/10/2009 06:11 PM, Greg KH wrote:
> On Thu, Dec 10, 2009 at 01:45:30PM +1300, Michal Ludvig wrote:
>> Hi,
>>
>> is it somehow possible to generate two separate kernel modules from one
>> source file?
>>
>> What I want is roughly:
>> mymodule-type1.ko compiled from: mymodule.c -D_TYPE_1
>> and
>> mymodule-type2.ko compiled from: mymodule.c -D_TYPE_2
> [..]
> You can't do it directly.
> 
> You can do it by a trick of having the .c file included from another .c
> file.
> 
> But I really don't recommend doing it, please figure out how to handle
> both code types together in the same module, as the same time, that's
> the only way the code would be acceptable to the kernel community.

Thanks Greg. I have factored the type1/type2 backends out to two
separate source files and link the two kernel modules from a common
frontend and one of the backends. The Makefile now looks much cleaner too.

M.

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