Re: [RFC] building postgres with meson

Hi,

On 2021-10-12 09:15:41 -0700, Andres Freund wrote:
> > For example, at the time, gcc on macOS was not supported. Meson thought, if
> > you are on macOS, you are surely using the Apple compiler, and it supports
> > these options.
>
> I'm pretty sure this one now can just be overridden with CC=gcc. It can on
> linux and windows, but I don't have ready interactive access with a mac
> (leaving cirrus asside, which now has a "start a terminal" option...).

It was a tad more complicated. But only because it took me a while to figure
out how to make gcc on macos actually work, independent of meson. Initially
gcc was always failing with errors about not finding the linker, and
installing binutils was a dead end.

Turns out just using a gcc at a specific path doesn't work, it ends up using
wrong internal binaries or something like that.

Once I got to that, the meson part was easy:

$ export PATH="/usr/local/opt/gcc/bin:$PATH"
$ CC=gcc-11 meson setup build-gcc
...
C compiler for the host machine: gcc-11 (gcc 11.2.0 "gcc-11 (Homebrew GCC 11.2.0) 11.2.0")
...
$ cd build-gcc
$ ninja test
...

181/181 postgresql:tap+subscription / subscription/t/100_bugs.pl OK 17.83s 5 subtests passed

Ok: 180
Expected Fail: 0
Fail: 0
Unexpected Pass: 0
Skipped: 1
Timeout: 0

One thing that is nice with meson's testrunner is that it can parse the output
of tap tests and recognizes the number of completed / failed subtests. I
wonder whether we could make pg_regress' output tap compliant without the
output quality suffering too much.

Greetings,

Andres Freund