Increase FD_SETSIZE from its default of 64 on Cygwin #57
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This is basically the same problem that tso-22839 is addressing, but applied to Cysignals (specifically the pselect module). It's necessarily to manually bump up
FD_SETSIZE
to something reasonable, and ISTM the easiest way to do that consistently, especially with Cython, is to pass it at build time.This came up in Sage when running
./sage -t
with a large number of processes.