[Bug 264949] lang/gcc11: Needs build time warning for /tmp consumption

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264949

Mark Millard <marklmi26-fbsd@yahoo.com> changed:

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                 CC|                            |marklmi26-fbsd@yahoo.com

--- Comment #4 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
(In reply to Lorenzo Salvadore from comment #1)

poudriere(-devel) based build? If so, what USE_TMPFS in
/usr/local/etc/poudriere.conf ?

I'll note that if USE_TMPFS includes workdir (for example, for "yes"),
something
like rust can use 20+ GiBytes of tmpfs. The cited change in how rust was made
to
work does not generally solve the problem that it was trying to solve, just for
a limited range of styles of builds.

poudriere.conf also has:

# List of package globs that are not allowed to use tmpfs for their WRKDIR
# Note that you *must* set TMPFS_BLACKLIST_TMPDIR
# EXAMPLE: TMPFS_BLACKLIST="rust"

The TMPFS_BLACKLIST_TMPDIR place needs sufficient free  disk space, even though
this avoids RAM+SWAP being needed.

I avoid large tmpfs use by poudriere bulk runs via using USE_TMPFS="data".

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