Re: [Outreachy kernel] Doubt regarding build warnings

[Julia Lawall <julia.lawall@lip6.fr>]

On Tue, 9 Feb 2016, Arnd Bergmann wrote:

> On Tuesday 09 February 2016 16:49:31 Julia Lawall wrote:
> > On Tue, 9 Feb 2016, Arnd Bergmann wrote:
> >
> > > On Tuesday 09 February 2016 16:18:55 Julia Lawall wrote:
> > > >     make M=drivers/staging: This seems to try to link the modules in a
> > > > previously build vmlinux file.
> > > >
> > > > Make path/ could be a reasonable choice for a localized change within a
> > > > single driver, or for a change localized to drivers staging. In any case,
> > > > as a minimum always check that compilation produces a .o file for every
> > > > file that your patch changes. If there is no .o file, you have not
> > > > compiled the file, and you need to look for other compiler options.
> > >
> > > Ok, sounds good. I've added a little bit more detail now:
> > >
> > > http://kernelnewbies.org/FirstKernelPatch?action=diff&rev2=25&rev1=24
> >
> > Thanks.  What is -sj2?
> >
> >
>
> -s is 'silent', -j2 is used to build on two threads in parallel rather than
> one. On second thought, I'll remove those again, as this prevents you
> from seeing which files get built.

-j2 could be left, but one could also infer it from the rest.

thanks,
julia