Re: meson: pgxs Makefile.global differences

Hi,

On 2023-08-17 14:45:54 -0500, Tristan Partin wrote:
> On Thu Aug 17, 2023 at 2:32 PM CDT, Andrew Dunstan wrote:
> > I started digging into a warning I noticed on my FDW builds where
> > Postgres is built with meson, e.g. <https://buildfarm.postgresql.org/cgi-bin/show_stage_log.pl?nm=crake&dt=2023-08-16%2018%3A37%3A25&stg=FileTextArrayFDW-build>
> > which has this:
> >
> > cc1: warning: ‘-Wformat-security’ ignored without ‘-Wformat’
> > [-Wformat-security]
> >
> > I found that the pgxs Makefile.global built under meson is a bit
> > different. On debug builds for both this is what I get on HEAD (meson)
> > and REL_15_STABLE (autoconf), stripped of the current components:

I assume "current" means the flags that are present in both cases?

> >          HEAD: CFLAGS =-Wshadow=compatible-local
> > REL_15_STABLE: CFLAGS =-Wall  -g
> >
> > The warning is apparently due to the missing -Wall.
> >
> > Shouldn't we be aiming for pretty much identical settings?

The difference for -Wshadow=compatible-local is due to changes between 15 and
HEAD.

We're indeed not adding -Wall right now (the warning level is handled by
meson, so it doesn't show up in our cflags right now).

> I agree that they should be identical. The meson bild should definitely be
> aiming for 100% compatibility for the Makefile.global.

I don't think that's feasible. It was a fair bit of work to get the most
important contents to match, while skipping lots of things that are primarily
relevant for building the server (which isn't relevant for pgxs).

That said, in this specific case, I agree, we should likely emit -Wall to
Makefile.global in meson as well.

Greetings,

Andres Freund

PS: I don't have andres(at)anarazel(dot)dev , just .de :)