Re: [RFC] building postgres with meson

st 13. 10. 2021 v 1:54 odesílatel Andres Freund <andres(at)anarazel(dot)de> napsal:
>
> Hi,
>
> On 2021-10-13 01:19:27 +0200, Josef Šimánek wrote:
> > I tried to clean and start from scratch, but I'm getting different
> > error probably related to wrongly configured JIT (LLVM wasn't found
> > during meson setup). I'll debug on my side to provide more info.
>
> ../src/backend/jit/jit.c:91:73: error: ‘DLSUFFIX’ undeclared (first use in this function)
> 91 | snprintf(path, MAXPGPATH, "%s/%s%s", pkglib_path, jit_provider, DLSUFFIX);
> | ^~~~~~~~
>
> This *very* likely is related to building in a source tree that also contains
> a "non-meson" build "in place". The problem is that the meson build picks up
> the pg_config.h generated by ./configure in the "normal" build, rather than
> the one meson generated itself.
>
> You'd need to execute make distclean or such, or use a separate git checkout.
>
> I forgot about this issue because I only ever build postgres from outside the
> source-tree (by invoking configure from a separate directory), so there's
> never build products in it. I think at least I need to make the build emit a
> warning / error if there's a pg_config.h in the source tree...

Hello, thanks for the hint. I can finally build using meson and run
regress tests.

The only problem I do have currently is auto-detection of perl. I'm
getting error related to missing "Opcode.pm". PERL is autodetected and
enabled (https://pastebin.com/xfRRrDcU)

I do get the same error when I enforce perl for current master build
(./configure --with-perl). Using ./configure with perl autodetection
skips plperl extension on my system.

Disabling perl manually for meson build (meson setup build
--reconfigure --buildtype debug -Dperl=disabled) works for me.

>
> This is the part of the jit code that's built regardless of llvm availability
> - you'd get the same error in a few other places unrelated to jit.
>
> Greetings,
>
> Andres Freund