From: [email protected]
Date: Wed, 16 May 2012 14:33:12 +0300
To: [email protected]
Subject: Re: [lfs-support] LFS-7.1: 6.37. Automake-1.11.3 (TEST FAILURE)!

> I expect every chip has its peculiarities, and my CPUs are not an exception.
>I failed to build LFS-6.8 (if I remember correctly, it was before 7.0 for 
>sure) with -j2, however all worked fine with -j1. 
>I haven't tried building in parallel on my later builds though, so maybe I 
>should.


>On the other hand, almost all software after binutils-gcc-glibc builds in a 
>matter of minutes anyway, mostly under one minute, not counting the test 
>suites. And tests as we see from >reports are better run with j1. Good time 
>for brushing up on man pages while waiting, I think. 



>In BLFS all packages except glib and mplayer were built with -j2, no problem

>EK

In my machine, LFS-7.1 compiled good with -j2 switch except automake in section 
6. however, so far!
-Yasser

On 16 May 2012 13:29, Simon Geard <[email protected]> wrote:


On Tue, 2012-05-15 at 19:43 +0300, Эмиль Кранц wrote:

> By trial and error I have found that any action that takes more than

> one SBU in LFS is better off with -j1.

>

> BLFS packages are more agreeable with -j2 switch.

>

> On my dual core machine only kernel compiles flawlessly with -j2

> switch. Binutils and compiled against them gcc and glibc were all

> faulty with -j2. I have discovered it early enough, at the entering

> the chroot environment. It may be a peculiarity of my abacus, of

> course. However, I'd stick with recommendation not to use -j2 in

> production environment.



That surprises me. Runnning tests in parallel may be flaky, but the

actual compilation step should be fine. Every package in the book built

fine with -j6, last time I tried (on hardware capable of it).



Simon.


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