GentooTipsAndTricks < Main

---+ Gentoo Tips And Tricks

---++ Updating world

Use: =emerge -a -u --deep --newuse world 2>&1 | tee emerge-world.txt=

Check the messages at the end of emerge-world.txt, to see if you need to reconfigure your system after packages have been upgraded.

To make sure you did not break any library dependencies. Run =revdep-rebuild= after a world upgrade.

---++ Cleaning old packages after updating world

After updating world, remove old or unneeded packages using: =emerge -a --depclean=.
After this, you need to check the dependencies of all installed packages using: =revdep-rebuild=.

---++ Overriding environment settings

For some packages, you may need to override environment settings from make.conf. Do this by creating a file called:
   * /etc/portage/env/[category]/[package] or
   * /etc/portage/env/[category]/[package]-[version]

For example:

/etc/portage/env/sys-devel/gcc-4.2.4
<verbatim>
export CFLAGS="-O2 -march=athlon64 -pipe"
export CXXFLAGS="${CFLAGS}"
</verbatim>

I normally use  =CFLAGS="-O2 -march=barcelona -pipe"= in make.conf, which is not supported yet in gcc-4.2.4.

-- Main.IvoVanGeel - 27 Feb 2011
This topic: Main > WebHome > GentooTipsAndTricks
Topic revision: r1 - 27 Feb 2011 - IvoVanGeel