Re: meson: pgxs Makefile.global differences

> On Aug 17, 2023, at 4:51 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
>
> 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?

Yes, sorry, meant to type common.

>
>
>>> 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.
>
>

Cool

Cheers

Andrew