On Sun, Nov 07, 2021 at 12:38:20AM +0100, Dimitry Andric wrote: > On 6 Nov 2021, at 23:53, Stephen Montgomery-Smith > <montgomerysmithstep...@gmail.com> wrote: > > > > Does anyone else have the problem of running out of RAM when building > > devel/llvm13? I have 6 CPUS, 4G of RAM, and 4G of swap. > > > > I can solve it by building with MAKE_JOBS_UNSAFE=yes, but then the build is > > so slow. > > > > It seems that there is a small part of the build which requires a lot of > > RAM, and it would be nice to restrict just that portion of the build to > > just one CPU. > > Try turning off the FLANG option. In my release testing for llvm 13.0.0 I > found this eats up most of the memory during a build.
If you turn of FLANG, I also recommend disabling MLIR. It's nominally a separate thing with other uses, but I believe only flang uses it in tree. If we could isolate which file(s) use too much memory it might be possible for upstream to put in an exception to single-thread around them. BTW, which architecture are you building for? -- Brooks
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