[OE-core] [PATCH] autotools.bbclass: Add functionality to force a clean of ${B} when reconfiguring (and ${S} != ${B})

[McClintock Matthew-B29882]

On Wed, Sep 12, 2012 at 9:16 AM, Richard Purdie
<richard.purdie at linuxfoundation.org> wrote:
> On Tue, 2012-09-11 at 19:01 +0000, McClintock Matthew-B29882 wrote:
>> On Tue, Sep 11, 2012 at 9:22 AM, Richard Purdie
>> <richard.purdie at linuxfoundation.org> wrote:
>> > Unfortunately whilst rerunning 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 removal of the build directory (${B}) when configure is
>> > rerunning, the sstate checksum for do_configure has changed and ${S} != ${B}.
>> > We could simply use a stamp but saving out the previous configuration checksum
>> > adds some data at no real overhead.
>> >
>> > If we find there are things where we want to disable this behaviour with
>> > CONFIGURESTAMPFILE = "" in the recipe, or users could disable it globally.
>> >
>> > [YOCTO #2774]
>> > [YOCTO #2848]
>> >
>> > This is particularly helpful for eglibc and gcc which use split builds by default and
>> > are a particular source of reconfigure type problems.
>> >
>> > Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
>>
>> Is it feasible to back port this to denzil? I've encountered what I
>> think are similar issues reconfiguring gcc for example.
>
> One of the bugs above is open against denzil and the issue certainly
> exists there. The patch should apply equally well there.
>
> I'd suggest we let this settle in master for a week or two and then add
> it to the backport queue if no problems arise.
>
> Cc'ing Scott so he's aware of this.

I've added this to my denzil branch and will start doing build testing.

http://git.yoctoproject.org/cgit/cgit.cgi/poky-contrib/log/?h=mattsm/denzil

-M

>
> Cheers,
>
> Richard
>
>
>
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