$(CC) is used to link powerpc vDSO

[nathanchance]

This means that ld.lld might not be used (see #342 for more background).

https://elixir.bootlin.com/linux/v5.3.12/source/arch/powerpc/kernel/vdso32/Makefile

https://elixir.bootlin.com/linux/v5.3.12/source/arch/powerpc/kernel/vdso64/Makefile

[tpimh]

-fuse-ld=lld workaround is good, but not very reliable, it's better to split those steps in two: separate compilation and linking. So it's easier to specify any linker and inspect linker options.

[nickdesaulniers]

So, similar to #785 (mips) but ppc?

[nathanchance]

https://lore.kernel.org/lkml/20200901222523.1941988-1-ndesaulniers@google.com/

[nickdesaulniers]

heh, I should have checked the issue tracker. Seems I'm starting to forget about open issues we have. Maybe it's time for me to do a bug scrub and reread them all.

[nickdesaulniers]

I think this is causing issues because -no-integrated-as is dropped, too: https://groups.google.com/g/clang-built-linux/c/ayNmi3HoNdY

[nathanchance]

This is still relevant but judging from Nick's patch series above, I think this would require a pretty significant rewrite of the PowerPC vDSO Makefiles.

[nickdesaulniers]

So Christophe had mentioned that my series would crash BFD 2.26. @nathanchance mentioned an issue with ppc44x_defconfig that I was not able to reproduce.

Seems like this was worked around in
commit 4c62285 ("Revert "powerpc/build: vdso linker warning for orphan sections"")

I've re-pinged https://lore.kernel.org/lkml/3d837a36-a186-6789-7924-eaa97f056b68@csgroup.eu/. Attached are rebased patches.
ppc.774.mbox.txt