gub targets + binary packages

[Jonas Hahnfeld]

Hi all,

lately I've been playing with gub, partly to get python3 packaged. Upon
inspection, it seems some targets are broken and some are ... a bit
out-of-date:

darwin-ppc: Support for applications targeting PowerPC was removed in
Darwin 11.0 / Mac OS X 10.7, released in 2011.
darwin-x86: Support for 32-bit applications was removed in today's
macOS 10.15.
(darwin-64 is not currently supported in gub.)

freebsd-32 / freebsd-64: Apart from issues with the installer, the
binaries don't work on my virtual machine: gub links the executables to
a GNU libc which doesn't match the .so versions actually installed on a
current FreeBSD (FreeBSD 12.1: libc.so.7 vs libc.so.6 and libm.so.5 vs
libm.so.4). Even if the versions matched, I'm not sure that mixing
different libraries (GNU libc vs FreeBSD libc) would work. Maybe I'm
doing something wrong, does anyone use these pre-built binaries?

linux-64 seems to work fine, linux-x86 is probably getting less
important with most distributions discontinuing support for 32-bit
kernels (yes, you could run 32-bit application on 64-bit kernels, but
still ...).
The most important target is probably Windows / mingw, which is also
32-bit but works on current 64-bit systems.

Do we have numbers about how often each binary is downloaded / used?
This could help prioritize work / selection of targets. I'm not
proposing anything right now, just thinking out loud.

Thanks,
Jonas

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