[OE-core] [PATCH] autotools.bbclass: Add functionality to force a distclean when reconfiguring

[Mark Hatle]

On 9/8/12 10:44 AM, Colin Walters wrote:
> On Fri, 2012-09-07 at 17:05 +0100, Richard Purdie wrote:
>> Unfortunately whilst reruning configure and make against a project will mostly
>> work there are situations where it does not correctly do the right thing.
>>
>> In particular, eglibc and gcc will fail out with errors where settings
>> do not match a previously built configuration. It could be argued they are
>> broken but the situation is what it is. There is the possibility of more subtle
>> errors too.
>>
>> This patch adds a "make distclean" call to recipes where configure is
>> rerunning and the sstate checksum for do_configure has changed. We could
>> simply use a stamp but saving out the previous configuration checksum
>> adds some data at no real overhead.
>
> The major problem with distclean is that it completely falls over in the
> scenario where the source code has changed; the new distclean won't know
> about *old* object files it no longer builds, files renamed, etc.
>
> In GNOME we just this cycle landed this patch to use "git clean -dfx"
> instead of "make distclean" if possible:
> https://bugzilla.gnome.org/show_bug.cgi?id=656081
>
> It might be interesting to have an option to run:
> "git init; git add .; git commit -a -m auto-import" on each tarball
> build in OE.  I've been considering doing this for jhbuild.
>
> (My latest build system *only* builds from git repositories, so
>   it works there =) )

While we're not managing the patching w/ git.. we are with quilt.  Does quilt 
have any facilities for restoring to the pristine last copy vs whatever is in 
the current tree?  (I don't think it does BTW.)

--Mark

>
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