[Qemu-devel] Someone kill the in-tree build, please (was: MIPS qemu build failure)

[Markus Armbruster]

"Daniel P. Berrange" <address@hidden> writes:

> On Fri, Sep 18, 2015 at 09:53:31AM +0100, Leon Alrae wrote:
>> On 18/09/2015 09:24, Daniel P. Berrange wrote:
>> > On Thu, Sep 17, 2015 at 07:38:53PM +0100, Peter Maydell wrote:
>> >> On 17 September 2015 at 19:21, Steve Ellcey <address@hidden> wrote:
>> >>>
>> >>> Following up to my own email.  Apparently the reason I get this error is
>> >>> that I am building with "--disable-tools --disable-system".  I don't need
>> >>> the tools and I don't have pixman on my build system so if I don't use
>> >>> "--disable-tools --disable-system" I get an error about not having pixman
>> >>> installed.
>> >>
>> >> We ship pixman as a git submodule so that you don't have to have
>> >> a system pixman, though the configure options you're using should work.
>> >>
>> >>> When I do use "--disable-tools --disable-system" on the
>> >>> configure line I get:
>> >>>
>> >>> make[1]: *** No rule to make target `../qom/object.o', needed by
>> >>> `qemu-mips'.  Stop.
>> >>> make: *** [subdir-mips-linux-user] Error 2
>> >>> Error: Make command failed, stopping build.
>> >>
>> >> Daniel, this sounds like more fallout from your recent changes?
>> > 
>> > I've just tried './configure --enable-tools --disable-system && make' and
>> > got a successful build, including the qemu-mips binary, so I wonder if
>> > there's some stale build artifacts, or other configure CLI args
>> 
>> Note that Steve used --disable-tools, not enable. I just tried and it fails
>> also for me:
>
> Opps, when I tested, I *did* in fact use --disable-tools - just my email
> here was wrong.
>
>> $ ../qemu/configure --disable-tools --disable-system && make
>> (...)
>> make[1]: *** No rule to make target `../qom/object.o', needed by
>> `qemu-aarch64'. Stop.
>> make: *** [subdir-aarch64-linux-user] Error 2
>
> Ahh, this is useful.
>
> You have your build directory *outside* the QEMU source tree,
> eg $GIT/../build, whereas I had been testing with $GIT/build
> and an non-VPATH build.
>
> I can in fact reproduce if building completely outside the GIT tree
> like you show.
>
> I'll look at producing a fix shortly...

Dropping the in-tree build entirely would save us from such unnecessary
build breakages.  Unfortunately, I haven't been able to find the time to
write a patch.  Any takers?