Re: BUG #15964: vacuumdb.c:187:10: error: use of undeclared identifier 'FD_SETSIZE'

Hi,

On 2019-08-17 19:06:33 +0000, PG Bug reporting form wrote:
> I'm trying to compile Postgresql from master on my OpenBSD machine, but I'm
> getting a build failure here:
> vacuumdb.c:184:26: error: use of undeclared identifier 'FD_SETSIZE'
> if (concurrentCons > FD_SETSIZE - 1)
> ^
> vacuumdb.c:187:10: error: use of undeclared identifier 'FD_SETSIZE'
> FD_SETSIZE
> - 1);
> ^
> 2 errors generated.

Yea, that file is clearly missing an include for #include
<sys/select.h>. I don't immediately see how that file is included on
other platforms, but it's obviously not enough for your version of
openbsd.

I assume adding

#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

after

#include "postgres_fe.h"

in vacuumdb.c fixes the problem?

Michael, it looks like this is an oversight in

commit 5f3840370b63fdf17f704a285623ccc233fa8d4f
Author: Michael Paquier <michael(at)paquier(dot)xyz>
Date: 2019-07-19 09:31:58 +0900

Refactor parallelization processing code in src/bin/scripts/

Greetings,

Andres Freund