Re: Clean up build warnings of plperl with clang-12+

Michael Paquier <michael(at)paquier(dot)xyz> writes:
> Backpatched this one as of 9ff47ea. That should allow the addition of
> -Werror on dangomushi.

I see you tried to do that by adding -Werror to CPPFLAGS. That doesn't
work because it breaks configure's tests. (I wonder if meson is any
smarter than autoconf about that.) The way I do it on my own
animals is like

if ($branch eq 'HEAD' or $branch ge 'REL9_3')
{
# Add -Werror so we get errors for warning conditions.
# Pre-9.3 PG doesn't compile cleanly with Sierra's cc.
# Can't put this in CFLAGS because it breaks configure,
# so use COPT instead.
$conf{build_env}{COPT} = "-Werror";
}

Guess I could drop the branch check now.

regards, tom lane