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Enable powerpc in make tinderbox using clang.

Authored by jhb on Jan 4 2020, 3:42 PM.



powerpcspe is disabled for now until it has been fixed.

This also adjusts the dependencies for kernels so that we
do not build kernels which for a TARGET_ARCH unless that
particular, this avoids building powerpcspe kernels for
now, but can also be useful to only build, e.g. mips64
via 'make TARGETS=mips TARGET_ARCHES_mips=mips64'.

Test Plan
  • make tinderbox builds powerpc using clang while skipping powerpcspe worlds and kernels

Diff Detail

rS FreeBSD src repository
Automatic diff as part of commit; lint not applicable.
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

jhb created this revision.Jan 4 2020, 3:42 PM
jhb added a subscriber: bdragon.Jan 4 2020, 3:43 PM

I would probably commit the universe_kernconfs change first and then powerpc second.

imp added inline comments.Jan 4 2020, 7:26 PM
723 ↗(On Diff #66339)

Is the nesting right on the target arch part of this? It looks weird and makes no sense to me

jhb added inline comments.Jan 5 2020, 3:15 AM
723 ↗(On Diff #66339)

It works. :)

You end up with the following dependency chain for powerpc (for example):

universe_kernconfs -> universe_kernconfs_{powerpc,powerpc64}


universe_kernconfs_powerpc -> universe_kernconfs_powerpc_{GENERIC,LINT}
universe_kernconfs_powerpc64 -> universe_kernconfs_powerpc64_{GENERIC64,LINT64}
universe_kernconfs_powerpcspe -> universe_kernconfs_powerpcspe_MPC58XXSPE

As a result, no powerpcspe kernels are built since universe_kernconfs only depends on powerpc and powerpc64 kernels. Once powerpcspe works with clang, we will add it to TARGET_ARCHES_powerpc which will then enable universe_kernconfs_powerpcspe.

Today what happens is that all of the powerpc kernels regardless of TARGET_ARCH are dependencies of universe_kernconfs_powerpc.

For a non-powerpc example, try the following command:

make TARGETS=mips TARGET_ARCHES_mips=mips64 MAKE_JUST_KERNELS=yes -n tinderbox NO_CLEAN=yes

Stock head will build all mips kernels including o32 and n32 kernels. With this patch it only builds n64 kernels. Worlds already DTRT. If you do MAKE_JUST_WORLDS it will only build the mips64 world.

Part of the weirdness is that universe_kernconfs is built in a nested make invocation where there is only one TARGET active, so using universe_kernconfs_${TARGET}_${TARGET_ARCH} would be redundant. Of course, this means that universe_kernconf_${TARGET}_${kernel} is also kind of redundant and could instead just be universe_kernconf_${kernel} and it would DTRT.

One side effect of this change btw is that kernel builds are now sorted first by target_arch then alphabetically, so now all the armv6 kernels build first rather than v6 and v7 kernels interleaved in alphabetical order.

imp accepted this revision.Jan 5 2020, 4:22 AM

Ok. Things make sense now....

This revision is now accepted and ready to land.Jan 5 2020, 4:22 AM