... btw, should we drop the now-unused config/ax_prog_perl_modules.m4 ? I'm inclined to do so, on the grounds that we're not likely ever to need it. I doubt we'd agree to require a non-core Perl module as part of either our build tooling or PL/Perl's dependencies. Not to mention that it'd go away anyway if we switch to meson.
regards, tom lane
