is COMPAT_FREEBSD11 still required for riscv64, in order to build rustc?

From: void <void_at_f-m.fm>
Date: Sun, 24 Aug 2025 14:52:32 UTC
A while ago there was this thread:

https://lists.freebsd.org/archives/freebsd-riscv/2024-September/000382.html

is COMPAT_FREEBSD11 still needed in riscv64 on 15-PRERELEASE ?

(not too sure where to ask about this. Please suggest a better-suited
mailing list if there is one better, thanks)
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