Re: [PATCH] gen_compile_command: Add support for separate KBUILD_OUTPUT directory

[Matthias Kaehlcke]

On Thu, Jun 20, 2019 at 12:53:22PM -0700, Nick Desaulniers wrote:
> On Thu, Jun 20, 2019 at 11:45 AM Matthias Kaehlcke <mka@xxxxxxxxxxxx> wrote:
> >
> > gen_compile_command.py currently assumes that the .cmd files and the
> > source code live in the same directory, which is not the case when
> > a separate KBUILD_OUTPUT directory is used.
> 
> Great point; android builds the kernel outside of the source dir
> (`make O=/non-source/path ...`). Thanks for the patch! BTW if CrOS is
> doing cool stuff with compile_commands.json; I'd like to know!
> Particularly; I'm curious if it's possible to generate Ninja build
> files from compile_commands.json; I do miss Doug's Kbuild caching
> patches' speedup.
> Acked-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>

At this point Chrome OS doesn't do anything with compile_commands.json
for the kernel. I was just toying around a bit after a presentation
from Tom Hughes about IDE integration and encountered this limitation.