Re: Parallel make problem with git master

On 03/07/2011 10:28 PM, Tom Lane wrote:
> 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.
>
>             

Oh, yes, I read it a long time ago, before I started doing Postgres 
work. I recall vaguely thinking about it when I began with Postgres, but 
I thought people smarter than me had probably worked out the problems 
:-) (Working with people smarter than me is one of the things I like 
about Postgres work.)

cheers

andrew