[gentoo-user] gcc upgrade and Portage questions

[gentoo-user] gcc upgrade and Portage questions

[Jesse Hannah]

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1. Has anyone noticed if programs compiled with the latest gcc (4.1.1, I 
believe) are any faster than those compiled with 3.4.6-r1? Also, is there any 
difference in the required time to compile? Any other issues I should know 
about with upgrading from 3.4.6-r1 to 4.1.1? (I use a pre-Prescott P4 
3000MHz, so it'd be nice if anyone had information for that or a comparable 
architecture.)

2. If I want to upgrade and rebuild my entire system (using a new gcc), is:
	emerge -u gcc
	emerge -e world
the right thing to do? Am I missing anything there?

(Note: if it makes any difference, I have ACCEPT_KEYWORDS="~x86" set in 
my /etc/make.conf. Any problems this could cause?)
-- 
Jesse Hannah

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Re: [gentoo-user] gcc upgrade and Portage questions

[Daniel da Veiga]

On 6/14/06, Jesse Hannah <jesse.hannah@gmail.com> wrote:
> 1. Has anyone noticed if programs compiled with the latest gcc (4.1.1, I
> believe) are any faster than those compiled with 3.4.6-r1? Also, is there any
> difference in the required time to compile? Any other issues I should know
> about with upgrading from 3.4.6-r1 to 4.1.1? (I use a pre-Prescott P4
> 3000MHz, so it'd be nice if anyone had information for that or a comparable
> architecture.)
>

I didn't notice any speed change after recompiling.

> 2. If I want to upgrade and rebuild my entire system (using a new gcc), is:
>         emerge -u gcc
>         emerge -e world
> the right thing to do? Am I missing anything there?

http://www.gentoo.org/doc/en/gcc-upgrading.xml
Has everything you need to know...

>
> (Note: if it makes any difference, I have ACCEPT_KEYWORDS="~x86" set in
> my /etc/make.conf. Any problems this could cause?)

So do I. So far, so good... Except that I use binary openoffice.

-- 
Daniel da Veiga
Computer Operator - RS - Brazil
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Re: [gentoo-user] gcc upgrade and Portage questions

[Richard Fish]

On 6/14/06, Daniel da Veiga <danieldaveiga@gmail.com> wrote:
> On 6/14/06, Jesse Hannah <jesse.hannah@gmail.com> wrote:
> > 2. If I want to upgrade and rebuild my entire system (using a new gcc), is:
> >         emerge -u gcc
> >         emerge -e world
> > the right thing to do? Am I missing anything there?
>
> http://www.gentoo.org/doc/en/gcc-upgrading.xml
> Has everything you need to know...

Yes, definitely follow the guide.

During the emege -e world, if you use MAKEOPTS=-jN, where N>1, you may
notice some things fail to build (at least I did).  Doing a
"MAKEOPTS=-j1 emerge -e --resume world" is the way around most
problems.

Also, if you use KDE, you may want to checkout the kdehiddenvisibility
flag before commencing the emerge -e world.  Setting it should improve
KDE startup times.  I can't say I noticed a dramatic speedup, but my
laptop is definitely at the high-end of the performance range...

-Richard
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