building a new kernel for ubuntu 10.04

[Lennart Sorensen]

On Thu, May 13, 2010 at 01:04:08AM -0400, Walter Dnes wrote:
>   I run Gentoo, so let's just say that I've done a lot of builds over
> the past few years<G>.  I eventually changed to...
> 
> MAKEOPTS="-j1"
> 
> ...notwithstanding that the Gentoo manual says that you can *USUALLY* do
> OK with N equal to twice the number of cpus or cores.  Every once in a
> while, I would run into a build that mysteriously failed at slightly
> different locations every time.  The gurus looking at the build output
> would notice that a procedure went like so...
> step 1) build a temporary file required for step 2
> step 2) do whatever
> step 3) delete the file created in step 1
> 
>   Sometimes, "parallel execution" would result in step 3 starting before
> step 2 was finished... oops!!!  Since the build takes place in another
> term, I don't care that it takes a bit longer with j1.  The time saved
> in not banging my head against a brick wall over mysterious build
> failures easily makes up for that.  The final binary is just as fast,
> which is all that a "sane Gentoo ricer" is concerned about.

Some makefiles are crap.  That's life.  Proper makefiles should work
with parallel builds.

-- 
Len Sorensen
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