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

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

--- Comment #13 from Lorenzo Salvadore <salvadore@freebsd.org> ---
(In reply to Mark Millard from comment #12)

Thanks Mark, I agree that default options should not be based on what users
choose as their options when they build their own ports. However I wonder

- if it makes sense to select default options that do not work for many
machines. Selecting such defaults will create issues for many users, and some
of them will not be able to figure out how to solve the problem. Some will ask
for help and we risk to repeat many times the same anwser.

- if it is correct to assume that the port build servers can build anything. I
think they can indeed compile GCC with LTO (maybe they have already done it),
but how much time do they need? We have lots of ports, maybe having the servers
stuck on a port that could be compiled much faster with different default
options is not a good idea, it could slow down the packages creation process
too much. Do we have some tool to check how much time do port build servers use
on specific ports? I tried https://pkg-status.freebsd.org/ , but I could not
find anything.

In the meantime, I tested building GCC 11 without any bootstrap option and with
STANDARD_BOOTSTRAP: I had very reasonable times in both cases. I still have to
verify how is GCC 11 with LTO_BOOTSTRAP in my case.

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