[RFC] Kbuild: allow code re-use across different directories

[Michal Marek]

Dne 13.9.2011 23:13, Arnaud Lacombe napsal(a):
> 2011/9/9 Michal Marek <mmarek at suse.cz>:
>> On 20.8.2011 02:37, Arnaud Lacombe wrote:
>>> With the attached patch, we would do:
>>>
>>> arch/foo/boot/Makefile:
>>> LDFLAGS_fancy.o := -DPANTS=30
>>> obj-y += fancy.o
>>> vpath-y += $(srctree)/arch/foo/lib
>>>
>>> and let GNU make do the job.
>>
>> I like this. The only issue I can think of right now, is that if you add
>> a large directory to vpath-y, then it would be easy to accidentally
>> reuse more files from that directory than intended. But that could be
>> easily prevented by isolating those reusable source files.
>>
> I do not think it is that dangerous. We enforce unique access to VPATH
> and we still prioritize $(src) over any other specified path.
> 
> That said, what would you want to pull the patch into -next, beside
> kernel.org being up ?

Just post it with a proper signoff. But there won't be any linux-next
until kernel.org is back again.

Michal