Re: [RFC] building postgres with meson

Hi,

On 2021-10-12 09:59:26 -0700, Andres Freund wrote:
> On 2021-10-12 11:50:03 -0400, Andrew Dunstan wrote:
> > It hung because it expected the compiler to be 'ccache cc'. Hanging in
> > such a case is kinda unforgivable. I remedied that by setting 'CC=gcc'
> > but it then errored out looking for perl libs. I think msys2 is going to
> > be a bit difficult here :-(
>
> Hm. Yea, the perl thing is my fault - you should be able to get past it with
> -Dperl=disabled, and I'll take a look at fixing the perl detection. (*)

This is a weird one. I don't know much about msys, so it's probably related to
that. Perl spits out /usr/lib/perl5/core_perl/ as its archlibexp. According to
shell commands that exists, but not according to msys's own python

$ /mingw64/bin/python -c "import os; p = '/usr/lib/perl5/core_perl/CORE'; print(f'does {p} exist:', os.path.exists(p))"
does /usr/lib/perl5/core_perl/CORE exist: False

$ ls -ld /usr/lib/perl5/core_perl/CORE
drwxr-xr-x 1 anfreund anfreund 0 Oct 10 10:19 /usr/lib/perl5/core_perl/CORE

So it's not too surprising that that doesn't work out. It's easy enough to
work around, but still pretty weird.

I pushed a workaround for the config-time error, but it doesn't yet recognize
msys perl correctly. But at least it's not alone in that - configure doesn't
seem to either, so I'm probably doing something wrong :)

> I can't reproduce the hanging though. I needed to install bison, flex and
> ninja and disable perl as described above, but then it built just fine.
>
> It does seems to crash somewhere in the main regression tests though, I think
> I don't do the "set stack depth" dance correctly for msys.

That was it - just hadn't ported setting -Wl,--stack=... for !msvc
windows. Pushed the fix for that out.

I guess I should figure out how to commandline install msys and add it to CI.

Greetings,

Andres Freund