clang-12 @12.0.1_1 +analyzer+debug+libstdcxx+tests: compiling consumes all available system memory; forces restart

[cooljeanius (Eric Gallager)]

I'm on Big Sur (11.6.8) with Xcode 13.2.1; I tried to get an Activity Monitor screenshot this time around before the system ran out of resources; let me try attaching that...

[cooljeanius (Eric Gallager)]

screenshot of a bunch of clang processes each taking up a bunch of memory while compiling clang-12

[cooljeanius (Eric Gallager)]

(as a side note, this bug has me wondering: instead of having just a binary yes/no for use_parallel_build, what about allowing Portfiles to set a maximum number of build jobs? 16 is probably too many here, but turning parallel build off completely here and limiting it to just a single job would probably also take too long... maybe just 4 jobs would work?)

[kencu (Ken)]

you can try easily -- set it in macports.conf

# Number of simultaneous make(1) jobs to use when building ports. If set
# to 0, the number of jobs will be the lesser of:
# - number of automatically-detected CPU cores
# - gigabytes of physical memory + 1
#buildmakejobs       	0

[jmroot (Joshua Root)]

You can certainly lower the number of build.jobs in a Portfile.

build.jobs    [expr {${build.jobs} > 4 ? 4 : ${build.jobs}}]