Ignoring blocked Packages on Portage

[fernandoc1]

I recently installed Sabayon 5.0 KDE and I have no issues in setting it up.
However I wanna know, if there is any way to ignore blocked packages on Portage, because I want to use a "emerge -e world" to recompile the system to my arch flags.
And another question: is there any known problems doing this? Can it break the system?
I'm thinking in try use "-O3 -march=amdfam10 -pipe" as my compilation flags since I have a AMD Phenon, do someone has any suggestions to make my system faster?

[wolfden]

You have to resolve the blocks

If you want to go portage, best is to install the core-cd, edit configs, rebuild, than build on top of that.

[fernandoc1]

I will try to use the CoreCD.
However isn't there an way to quickly optimize the whole system to my processor?
I don't care about costumizations, only about performance.
I wish I could install sabayon and with some commands I'm able to recompile the entire system, without any issues.
I don't know why I'm having so much troubles when using portage.
Every time I try to do something like "emerge --update --deep world" or "emerge -e world", I end up with my system broken.
Can you give me any suggestions?

[DHalens]

Yes, we can give you one suggestion: RTFM!
In more polite words: please take a look to Gentoo handbook http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml

[DontPanic]

However isn't there an way to quickly optimize the whole system to my processor?
I don't care about costumizations, only about performance.

The answer to this varies from person to person, but it's been a long-held observation of Gentoo users that the little smidgen of performance that you might by rebuilding everything is more than wiped out by the time and trouble involved in building the packages.

Most of us that use portage as our primary package management system do so for the increased flexibility, and the ability to reduce dependencies through USE flags, and also the plain fun and satisfaction of having such fine-grained control over the packages in your system.

You can gain far more speed by cutting down on the number of applets and other programs that are automatically loaded.

Back when portage was Sabayon's main package management system, Wolfden wrote an excellent guide for getting your system stabilized on portage from a Sabayon installation: HOWTO: Unoffical Guide To World Update

For me personally, I also use the guide for switching to stable packages (this is done in a manner that keeps currently installed testing packages, but won't upgrade until a package goes stable): HOWTO: Switch from Test to Stable Packages

As mentioned in Wolfden's guide, a good start is to stablize the 'system' package set first, then go on to stabilizing 'world'.