Re: Building cvs emacs on a dual-core machine

[Eric Lilja <mindcooler@gmail.com>]

Eli Zaretskii skrev:
>> From: Eric Lilja <mindcooler@gmail.com>
>> Date: Wed, 20 Dec 2006 12:47:13 +0100
>>
>> I recently upgraded my computer with a dual-core CPU. I've been enjoying 
>> nice decreases in compile time in my own projects by specifying --jobs=2 
>> when invoking make.
>>
>> However, when I tried that with emacs it started compiling, very fast 
>> with both cores busy, but the build craps out (sorry, no log) after a 
>> little while.
> 
> Any such failures are bugs in the Emacs Makefiles, so please be sure
> to report them with full details, including the build log.

I will. This was with the cvs sources I downloaded yesterday (december 
19th). I have been trying a few times since the beginning of november 
(that's when I got the dual core cpu), neither have been able to build 
when specifying --jobs=2. I will do a fresh checkout later today and 
hopefully provided you with the details you need.

> 
> If you didn't try this with the CVS version or with the latest
> pretest, please do try one of these, because many problems present in
> Emacs 21.x are already resolved in the latest development code.
> 
> Thanks in advance.
> 
>> Maybe because it tries to build something that depends on 
>> something else that has not been quite finished yet because when 
>> multiple jobs are specified things doesn't happen in serial anymore?
> 
> A bug-free Makefile should never cause any such trouble, since all the
> dependencies are supposed to be spelled out in it, and Make will never
> start building a file until all its prerequisites are built.

- Eric