Re: Separate obj/src dir

[simon@himi.org (Simon Fowler)]

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On Tue, Nov 19, 2002 at 02:51:54PM -0600, Brian Jackson wrote:
> Sam Ravnborg writes: 
> 
> <snip>
> >Another drawback is that when a .h file exist in the
> >SRCTREE but not in the OBJTREE the generated dependencies
> >will point out the .h file located in SRCTREE.
> >This happens for generated .h files, and therefore a simple
> >check is made in kbuild to check that the SRCTREE is
> >cleaned/mrpropered.
> 
> I wonder how hard it would be to do this for other files types. It would be 
> sort of handy to be able to copy a single file out of the source tree into 
> the build tree, and have the build use the copy in the build tree. Example: 
> you want to test a one liner in drivers/scsi/sd.c, you could just copy sd.c 
> into the build tree, and make the change and test it out. That could be a 
> huge space savings. That would help out those of us that are stuck with 
> tiny hard drives in our laptops :) 
> 
For that you probably want to use the hardlinked trees approach.
Just do a cp -al linux-2.5 scratch; then change your file and build
from the copy.

Simon

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