[Bug 265254] lang/gcc11: build gets stuck

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265254

--- Comment #24 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Lorenzo Salvadore from comment #23)

No one has to wait for any changes --if they are willing to use the
OPTIONS to choose to avoid LTO_BOOTSTRAP or do other things like the
FreeBSD build servers do.

I'll note that my own reports here indicated a 1 min. load average
of 18 for a 4 FreeBSD-cpu environment, somewhat more than 4*4. Not
as extreme but still notable. But I knew about the behavior up front
and my configurations are set up to deal with such high load average
contexts.


Note that GCC may be configurable:

The confirmations in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106328
comments 2..4 by Richard Biener report:

QUOTE
GCCs WPA stage fork()s to write out LTRANS IL object files in parallel - those
processes are not controlled by make
END QUOTE

But it also reports a "--param lto-max-streaming-parallelism" that could
be controlled now, without waiting for gcc changes, although I've never
experimented with such.

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