Missing dependencies in parallel builds

[chusopr]

Hi,

I've found very often that builds fail when more than one make job is run in parallel with errors that seem to be related to trying to pull dependencies that are not built yet:

File "src/networks/donkey/donkeyNodesDat.ml", line 3, characters 5-18:
3 | open CommonOptions
         ^^^^^^^^^^^^^
Error: Unbound module CommonOptions

Other times I get an error about missing Printf2, but I was not able to reproduce it for this ticket.

Those errors disappear when telling make to use only one job (-j1).

I don't know enough about OCaml or Make to debug it, but it seems to miss something to enforce dependencies are built first.

[ygrek]

This is unlikely I will work on this one.
More likely is that I will try to get rid of make build system in favor of dune, but no ETA.

[chusopr]

Yes, I get it, especially when there is a workaround. And I think the current system is a bit outdated too.
But I thought it was appropriate to report it and also that way people with the same issue could find the workaround.

[ygrek]

Yes, sure, thanks for reporting!