[ccache] Build problem of qemu>=2.0 when using ccache.

[marcin kowalski]

No change, i'll try getting the ccache logs for inspection then.


2014-08-10 10:08 GMT+02:00 Joel Rosdahl <joel at rosdahl.net>:

> > It doesn't seem to make a difference. Similarily with completely
> emptied cache.
>
> OK. Another thing to test: CCACHE_CPP2=1
>
> > I'd like to know how can i more closely narrow down the problem in
> > question, since debugging ccache/compilers is not something i am
> > familiar with.
>
> The way to troubleshoot ccache problems like these is normally to enable
> ccache debug logging. This is done by setting CCACHE_LOGFILE to a suitable
> log file path. However, to be able to make anything out of the logged
> information in a more complex build scenario like yours you likely also
> have to find out what compiler invocation behaves differently with and
> without ccache.
>
> -- Joel
>
>
>
> On 9 August 2014 21:35, marcin kowalski <yoshi314 at gmail.com> wrote:
>
>> It doesn't seem to make a difference. Similarily with completely emptied
>> cache.
>>
>>
>> 2014-08-09 11:07 GMT+02:00 Joel Rosdahl <joel at rosdahl.net>:
>>
>> > Does it work if you disable ccache's direct mode, i.e. if you build
>>> with CCACHE_DIRECT=0?
>>>
>>> Sorry, that should have been CCACHE_NODIRECT=1.
>>>
>>> -- Joel
>>>
>>>
>>>
>>> On 9 August 2014 10:59, Joel Rosdahl <joel at rosdahl.net> wrote:
>>>
>>>> Hi,
>>>>
>>>> > Completely disabling ccache makes the build proceed correctly.
>>>> Cleaning the
>>>> > ccache caches doesn't help.
>>>>
>>>> Does it work if you disable ccache's direct mode, i.e. if you build
>>>> with CCACHE_DIRECT=0?
>>>>
>>>> -- Joel
>>>>
>>>>
>>>>  On 7 August 2014 12:14, marcin kowalski <yoshi314 at gmail.com> wrote:
>>>>
>>>>>  Hi all, i (and another user) have been experiencing odd issues when
>>>>> building qemu-2.0 or 2.1 with ccache enabled. Systems in question are
>>>>> gentoo, 64bit installations with differing gcc versions.
>>>>>
>>>>> Basically, it seems that build directory is missing some source files,
>>>>> or
>>>>> some preprocessing stage before actual compilation is adversely
>>>>> affected by
>>>>> ccache - some source files are not placed where build rules are
>>>>> expecting
>>>>> them to be, so this does not look like simple cache corruption issue.
>>>>>
>>>>> Build logs and some more information are available here :
>>>>> https://bugs.gentoo.org/show_bug.cgi?id=512484
>>>>>
>>>>> Completely disabling ccache makes the build proceed correctly.
>>>>> Cleaning the
>>>>> ccache caches doesn't help.
>>>>>
>>>>> I'd like to know how can i more closely narrow down the problem in
>>>>> question, since debugging ccache/compilers is not something i am
>>>>> familiar
>>>>> with.
>>>>>
>>>>> _______________________________________________
>>>>> ccache mailing list
>>>>> ccache at lists.samba.org
>>>>> https://lists.samba.org/mailman/listinfo/ccache
>>>>>
>>>>>
>>>>
>>>
>>
>