Running KUnit using the wrapper script

[Mark Brown]

I've been trying to do some stuff with KUnit but I can't seem to
find a current tree where KUnit builds.  Running on Debian stable
starting from a clean -next tree and running:

   ./tools/testing/kunit/kunit.py config
   ./tools/testing/kunit/kunit.py build

based on Documentation/dev-tools/kunit/start.rst.  However I get:

[00:42:59] Configuring KUnit Kernel ...
[00:42:59] Building KUnit Kernel ...
Populating config with:
$ make ARCH=um O=.kunit olddefconfig
Building with:
$ make ARCH=um O=.kunit --jobs=8
ERROR:root:In file included from /usr/include/stdlib.h:1013,
                 from ../arch/x86/um/os-Linux/registers.c:8:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h: In function ‘atof’:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h:26:1: error: SSE register return with SSE disabled
   26 | {
      | ^
make[4]: *** [../scripts/Makefile.build:252: arch/x86/um/os-Linux/registers.o] Error 1
make[3]: *** [../scripts/Makefile.build:494: arch/x86/um/os-Linux] Error 2
make[3]: *** Waiting for unfinished jobs....
In file included from /usr/include/stdlib.h:1013,
                 from ../arch/um/drivers/fd.c:7:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h: In function ‘atof’:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h:26:1: error: SSE register return with SSE disabled
   26 | {
      | ^
make[3]: *** [../scripts/Makefile.build:252: arch/um/drivers/fd.o] Error 1
make[3]: *** Waiting for unfinished jobs....
In file included from /usr/include/stdlib.h:1013,
                 from ../arch/um/os-Linux/skas/process.c:7:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h: In function ‘atof’:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h:26:1: error: SSE register return with SSE disabled
   26 | {
      | ^
make[4]: *** [../scripts/Makefile.build:252: arch/um/os-Linux/skas/process.o] Error 1
make[3]: *** [../scripts/Makefile.build:494: arch/um/os-Linux/skas] Error 2
make[2]: *** [../scripts/Makefile.build:494: arch/um/os-Linux] Error 2
make[2]: *** Waiting for unfinished jobs....
make[2]: *** [../scripts/Makefile.build:494: arch/x86/um] Error 2
make[2]: *** [../scripts/Makefile.build:494: arch/um/drivers] Error 2
In file included from /usr/include/stdlib.h:1013,
                 from arch/um/kernel/config.c:7:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h: In function ‘atof’:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h:26:1: error: SSE register return with SSE disabled
   26 | {
      | ^
make[3]: *** [../scripts/Makefile.build:252: arch/um/kernel/config.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [../scripts/Makefile.build:494: arch/um/kernel] Error 2
make[1]: *** [/home/broonie/git/bisect/Makefile:2028: .] Error 2
make: *** [Makefile:226: __sub-make] Error 2

[00:43:20] Elapsed time: 20.233s

which isn't ideal.  v6.2 is also broken, albeit differently:

ERROR:root:`.exit.text' referenced in section `.uml.exitcall.exit' of arch/um/drivers/virtio_uml.o: defined in discarded section `.exit.text' of arch/um/drivers/virtio_uml.o
collect2: error: ld returned 1 exit status
make[2]: *** [../scripts/Makefile.vmlinux:35: vmlinux] Error 1
make[1]: *** [/home/broonie/git/linux/Makefile:1264: vmlinux] Error 2
make: *** [Makefile:242: __sub-make] Error 2

which makes bisecting a bit of an issue.  The kunit-fixes, kunit
and kunit-next trees in -next have the former error.  Can anyone
point me at a tree/config/commands that's suitable for working on
KUnit at the minute?
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