Re: [Qemu-devel] Compile error on FC17

[Laszlo Ersek <lersek@redhat.com>]

On 03/10/13 18:04, Peter Maydell wrote:
> On 10 March 2013 15:15, Gerhard Wiesinger <lists@wiesinger.com> wrote:
>> Tried make clean and make distclean already before I reported the issue.
>>
>> If I'm suppressing "warning as errors" I'm still getting errors:
>>
>> hw/usb/hcd-xhci.c: In function ‘xhci_set_ep_dequeue’:
>> hw/usb/hcd-xhci.c:1471:5: error: too many arguments to function
>> ‘trace_usb_xhci_ep_set_dequeue’
>> In file included from hw/usb/hcd-xhci.c:27:0:
>> ./trace.h:1052:58: note: declared here
> 
>> BTW: Isn't a new issue (around 2 month) but was very busy.
> 
> Oh, right. Tracing functions moved from trace.h to the files
> in the trace/ subdirectory. This means that if you didn't do
> a make clean or distclean before doing the git update then
> the new makefile knows nothing about the old trace.h file and
> so won't delete it, but the compiler may still pull it in anyhow.
> However this happened a long time back which is why I didn't
> mention it as a possibility (it was discussed on the list at
> the time as a number of people including me ran into it).
> If you remove all the files:
> trace.c trace.h trace.c-timestamp trace.h-timestamp
> this should resolve the problem.
> 
> This is an example of a longstanding problem we have, where
> the makefile's dependency rules aren't able to cope with
> changes to the project source file structure, and so clean,
> distclean and incremental build sometimes breaks across a
> git update. I think this is pretty intractable as a problem
> to solve; you can mitigate it by doing all your builds in
> a build directory rather than in the source tree itself,
> since then you can always just delete the whole build tree
> to get a definite from-scratch build.

There's also
$ git reset --hard
$ git clean -fdx
$ ./configure ...

Laszlo