The Pi4 (and maybe 3 and 2 as well, I don’t own a 3 and compiling on my 2 is going to be painful) use gnueabihf which the current known-architectures do not catch.

Pull request https://bitbucket.org/cactuscode/cactus/pull-requests/125/support-raspberry-pi4 adds code to recognize and and also fixes some reliance on GNU awk (or so it seems) rather than eg mawk (in raspbian minimal).

With these I can compile ET_2021_05 and run both the 2 and 1 process testsuites without a single error.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2550/support-compiling-in-raspberry-pi-4