CALL FOR TESTING: proposed enhancements for OMAP4

[Nicolas Pitre]

On Fri, 22 Apr 2011, Andy Green wrote:

> On 04/21/2011 07:47 PM, Somebody in the thread at some point said:
> > On Thu, 21 Apr 2011, Andy Green wrote:
> > 
> > > On 04/21/2011 07:08 PM, Somebody in the thread at some point said:
> > > 
> > > > > >     make ARCH=arm defconfig
> > > > > >     cat arch/arm/configs/omap4_defconfig>>.config
> > > > > >     make ARCH=arm oldnoconfig
> > > > 
> > > > 	make omap4_defconfig
> > > 
> > > Wow that is a lot simpler... if you know it.
> > > 
> > > When trying to figure this out I googled the original patch that added the
> > > savedefconfig and it doesn't mention this Makefile magic; I guess it was
> > > added
> > > later.
> > 
> > In fact, this has been there almost forever.  The rule is in
> > scripts/kconfig/Makefile on line 354.
> 
> Still, the fact is before you can just copy a whole config from
> arch/arm/configs to be .config and vice-versa which has been my usage pattern.
> Now with these optimized defconfigs, that doesn't work; it doesn't hurt to
> document how to use the new way (even better with your make target method).

Sure.  And you can still copy arch/arm/configs/foo_defconfig to .config 
and it should work (maybe a "make oldconfig" needed not to be prompted 
for all missing options).  But "make foo_defconfig" is shorter.

> It's possible I'm the only guy who missed the day at school where they talked
> about arbitrary defconfig targets in Makefile but I doubt it.

Well, most people are not aware of those goodies, so don't feel ashamed.  
I'm sure you weren't alone at the beach that day.  ;-)


Nicolas