[lfs-support] Final GCC Compile Weirdness - 1 Time? No, 2 nd Time? Perfect!

Eleanore Boyd cara117 at cox.net
Tue Jan 10 04:46:37 PST 2012

On 1/10/2012 6:34 AM, jasonpsage at jegas.com wrote:
>>> I find that if a make fails first time, but completes (or gets further ) on
>>> second run it is due to some race condition where you have multiple jobs
>>> and a new job thread is dependent on something that hasn't completed.
>>> The simplest way around this is to flag the make with -j1
>> FWIW I've never had a problem compiling gcc with make -j4
>> Also, if you read his script he doesn't use multiple jobs when he runs:
>> make -k check
> ACTUALLY - MAKEFLAGS set to 8 in my Root .bash_profile to make sure It
> was
> always in play. Race condition thing though may apply. I'm using a REAL
> PC now,
> but even when I use a Virtual MAchine I generally set 2 or more
> processes and
> set MAKE Flags accordingly.
>>> If you are having trouble with slow builds then have a look at top on your
>>> host system and see if anything is eating CPU and/or memory.
>>> I have had problems with polkitd and nautilus on Ubuntu (bad pulseaudio
>>> setup)
>>> Chrome is also a mem/CPU hog, especially if flash is enabled
>> Are you compiling in a virtual machine? If so, perhaps it is not making
>> all the system's resources available?
>> Andy
> Not now I'm not - I kind of got tired of waiting and configured my
> fastest machine
> for dual boot Win7/Slackware (32bit for making 32 bit LFS)
If you wanted to go back to a virtual machine, check EVERY tab on EVERY 
page. Oracle VirtualBox hides a critical option on a separate tab of the 
"System" page. I only found out about it when some of the ISOs I was 
testing wouldn't boot without it checked..


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