Re: [Qemu-devel] [PATCH v2 00/43] fix building of tests/tcg

[Alex Bennée]

Richard Henderson <address@hidden> writes:

> On 04/19/2018 03:58 AM, Alex Bennée wrote:
>> I did start playing with crosstool-ng and Linaro's own ABE scripts but
>> realised this could end up a massive time sync. What would be really
>> helpful is if the respective maintainers could encode their EXACT
>> STEPS for building their cross compilers into some docker recipes.
>
> Building a cross-compiler with an existing libc binary is easy.
> Building a cross-compiler without a libc is harder, and involves
> a bit of two-stepping to get things right.
>
> For someone who has never used docker, what's a recipe look like?
> Just a shell script that gets run within a container?
> Is there an opportunity to wget or local copy an existing libc
> tarball/package to put us into the easy case?

Yes, it's just a bunch of steps run from a known starting state. Our
debian-bootstrap.docker is probably the most complex as there is a seed
step before you enter the container to run the setup steps.

If you already have a built script for your compilers converting it to
docker is fairly trivial.

>
>> Finally the end of the series has me adding Emilio's fp-test to the
>> per-target builds. Unfortunately although some osdep.h and softfloat.c
>> fiddling allows us to build in most cases I still can't build for
>> example an i386 fp-test on an x86_64 host using the cross compiler as
>> it triggers incompatibilities with config-host.h - in this case Int128
>> support. Currently I just hackily disable fp-test for non-64 bit
>> platforms.
>
> It seems I can't even build fp-test for x86_64.
>
>   CROSS-BUILD x86_64 guest-tests with cc
> In file included from /home/rth/work/qemu/qemu/tests/fp/fp-test.c:14:0:
> /home/rth/work/qemu/qemu/include/qemu/osdep.h:30:10: fatal error:
> config-host.h: No such file or directory
>  #include "config-host.h"
>           ^~~~~~~~~~~~~~~
> compilation terminated.

Weird as that works for me. Has configure been run? Are you in a
external build dir?

>
>
> r~


--
Alex Bennée