FWIW, commandline length limits are a real thing, I've run into them
with Make, CMake, and Meson.
I did some work to help address them in Meson, see e.g.

And just for fun, here's a vaguely related changelog entry from long
ago, back when things were much worse:

Tue Jun  8 15:24:14 1993  Paul Eggert  (egg...@twinsun.com)
* inp.c (plan_a): Check that RCS and working files are not the
same.  This check is needed on hosts that do not report file
name length limits and have short limits.


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