[Bug 245511] lang/gcc9: build with base GCC on powerpc64 elfv1

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=245511

--- Comment #36 from Piotr Kubaj <pkubaj at FreeBSD.org> ---
Yes, this is happening with GCC 4.2.

It's not possible to use Clang with that environment.

Reminder:
GCC 4.2 uses ELFv1 ABI, Clang doesn't work there. GCC 4.2 is used until late
December's head.
Clang uses ELFv2 ABI and GCC 4.2 can't be used there. This is since late
December on head.

So only head currently uses Clang. Older branches are still on GCC 4.2 and will
need to be until their EOL, since we can't change ABI on stable. Switching from
ELFv1 to ELFv2 requires OS reinstallation. It's also not possible to mix
binaries from two ABI's (apart from using chroots / jails or VM).

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