Re: Parallel make problem with git master

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: Jeff Davis <pgsql@j-davis.com>
Cc: Bruce Momjian <bruce@momjian.us>, Peter Eisentraut <peter_e@gmx.net>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2011-03-08T03:28:45Z
Lists: pgsql-hackers
I wrote:
> I think what is happening here is that make launches concurrent sub-jobs
> to do "make install" in each of interfaces/libpq and interfaces/ecpg,
> and the latter launches a sub-sub-job to do "make all" in
> interfaces/libpq, and make has no idea that these are duplicate sub-jobs
> so it actually tries to run both concurrently.  Whereupon you get all
> sorts of fun failures.  I'm not sure if there is any cure that's not
> worse than the disease.

BTW, how many people here have read "Recursive Make Considered Harmful"?

http://aegis.sourceforge.net/auug97.pdf

Because what we're presently doing looks mighty similar to what he's
saying doesn't work and can't be made to work.

			regards, tom lane