[Buildroot] [PATCH] Add target-clean makefile target

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Dear Angelo Compagnucci,

On Wed, 16 Jul 2014 09:47:01 +0200, Angelo Compagnucci wrote:

> > (7) is due to the fact that Git was not rebuilt, so it still believes
> > that OpenSSL support is available. The scenario above is fairly simple,
> > but there are many, many more similar but more subtle scenarios to
> > screw things up.
> 
> Good catch, but this could be documented somewhere.

Right, but then a patch adding "make target-clean" should also be
responsible for adding the appropriate documentation :-)

> I think that is better to explain buildroot's users that they have to
> rebuild a package when they mess it's dependencies instead of all the
> whole rootfs! Compilation of a rootfs can take hours ...
> Yes, I know, probably removing Openssl screws up a hundred of packages
> and it's not practical to rebuild one by one, but I think this is a
> corner case more than the rule.

Not that much: any optional dependency in Buildroot will exhibit
exactly the same behavior, and there are hundreds if not thousands of
places were we rely on optional dependencies.

By I tend to agree that we could provide the tool, provided that there
is sufficient documentation to explain how to use it correctly.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com