Re: pbuilder + ccache suddenly fails
On Sun, May 6, 2012 at 2:40 PM, Steve M. Robbins <steve@sumost.ca> wrote:
> On Sun, May 06, 2012 at 01:21:57PM -0400, Andres Mejia wrote:
>> On Sat, May 5, 2012 at 9:57 PM, Steve M. Robbins <steve@sumost.ca> wrote:
>> > I've routinely used pbuilder to build packages for years.
>> > Yesterday, I have started to see the following failure:
>> >
>> > ccache: FATAL: Failed to create /var/cache/pbuilder/ccache/0/f: Permission denied
>
>
>> You should instead not enable ccache inside builds using pbuilder or
>> sbuild since the directories where these builds occur end up being
>> deleted, thus deleting the output generated from ccache.
>
> I haven't been explicitly using ccache inside pbuilder. In fact, I
> just put a build-conflict against ccache to avoid using it (#671173).
> Two years ago, pbuilder itself added support for ccache:
>
> pbuilder (0.197) unstable; urgency=low
>
> * Add builtin support for using ccache in pbuilder and enable it by default.
> Ship a new /var/cache/pbuilder/ccache dir and bind-mount and chown it to
> BUILDUSERID at build time. Install/remove ccache automatically on
> create/update if CCACHEDIR is set/unset. Update docs and remove old
> ccache config example. Add a NEWS entry featuring the change. Stop
> intalling ccache sample config
>
> -- Junichi Uekawa <dancer@debian.org> Wed, 23 Jun 2010 07:21:11 +0900
>
>
> I haven't done anything different recently so I'm quite mystified by
> my recent trouble. To work around this, I simply gave the world write
> permissions on /var/cache/pbuilder/ccache.
>
> Thanks,
> -Steve
Part of the reason to use pbuilder or sbuild is to build packages in a
clean chroot. Providing ccache support in this way isn't clean and
apparently it's prone to problems such as the bug you pointed out. See
also [1].
If you're going to upload to the archive, simply disable ccache.
1. http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=430765#35
--
~ Andres
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