Re: Fixing parallel make of libpq

Michael Paquier <michael(at)paquier(dot)xyz> writes:

> On Wed, Jan 08, 2020 at 01:33:13PM +0000, Dagfinn Ilmari Mannsåker wrote:
>> I noticed to my annoyance that 'make -j4 -C src/interfaces/libpq'
>> doesn't work in a clean checkout, because it can't find
>> libpgcommon_shlib and libpgport_shlib. It looks like that's because the
>> submake-libpgport dependency is declared on the all-lib target, not on
>> the shlib itself. Moving it to SHLIB_PREREQS instead fixes it, patch
>> for which is attached.
>
> Hmm. That logically makes sense. Isn't that a side effect of 7143b3e
> then? Now, FWIW, I am not able to reproduce it here, after trying on
> two different machines, various parallel job numbers (up to 32), and a
> couple of dozen attempts. Perhaps somebody else can see the failures?

It fails reliably for me on Debian Buster, with make 4.2.1-1.2and -j4.
The command to reproduce it is:

git clean -xfd && ./configure && make -Otarget -j4 -C src/interfaces/libpq/

Attached is the output of the `make` step with and without the patch.

- ilmari
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