Review of #19772 asked for this shape, and it applies to every architecture in
the series.
ARCH_HAVE_FORK described when it was available from inside its own definition,
which put the per-architecture condition somewhere nobody looks. The
architecture now says so itself.
The condition repeats the ARCH_ADDRENV dependency rather than relying on it,
because a select bypasses depends on: without that repetition an architecture
could offer fork() where there is no address environment to duplicate.
Assisted-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>