Re: [PATCH] Try harder to fix recently introduced crashes in ggc_collect

[Jason Merrill <jason@redhat.com>]

On Mon, May 22, 2017 at 12:28 PM, Martin Sebor <msebor@gmail.com> wrote:
> On 05/19/2017 11:26 AM, Bernd Edlinger wrote:
>>
>> On 05/19/17 19:05, Dominique d'Humières wrote:
>>>
>>> Hi Bernd,
>>>
>>> Your patches are causing troubles when I try to do "incremental updates
>>> »:
>>>
>>> After revision r248290 it fails with
>>>
>>> ../../work/gcc/cp/init.c:4916:10: fatal error: gt-cp-init.h: No such file
>>> or directory
>>>   #include "gt-cp-init.h »
>>>
>>> and after r248242 with
>>>
>>> ../../work/gcc/c-family/c-format.c:4215:10: fatal error:
>>> gt-c-family-c-format.h: No such file or directory
>>>   #include "gt-c-family-c-format.h »
>>>
>>> Note that after r248242 a full bootstrap succeeded (don’t know yet for
>>> r248290).
>>>
>>> Is there a way to fix that?
>>>
>>
>> No, unfortunately it looks like incremental does not work in this case.
>>
>> You can try to remove gcc/s-gtyp-input, maybe it un-breaks your
>> build.  However, I gave up at that point and did a full bootstrap
>> instead.
>
> I also keep running into this error.  Removing my build directory
> and starting from scratch usually fixes it, but it seems that almost
> every time git pull or svn update brings in new changes it comes back.

I've found that the key is ./config.status --recheck so that the
GTFILES variable gets updated from config-lang.in.  I'm not sure if
plain ./config.status is also needed, and/or removing the gtype stuff
from the build directory.

Jason