Hi, in the x86 Quick Install Guide [1] it is stated under "Code Listing 2.38: Last edit of make.conf": --snip-- You might want to recompile your whole system twice to make full use of your latest configuration changes. It would take quite a long time to complete and yield minimal speed benefits. It is recommended that you let your system optimise itself gradually over time when new versions of packages are released. --end of snip-- Two remarks: 1.) The phrase "recompile your whole system twice" implicates (at least for me) "emerge -e system && emerge -e system", while I read on the dev list about the stage1-discussion [2], that it is recommend to do "emerge -e world && emerge -e world && emerge --depclean", when you change your compile options (well yes, and USE flags). 2.) In chapter "5.e. Configuring the Compile Options" [3] of the Handbook there is nothing written comparing to this. In the next Code Listing "Code Listing 2.39: Update your packages" of the x86 Quick Install Guide there are some recommendations, what you should, when you update your system: --snip-- [...] emerge libtool [...] etc-update [...] perl-cleaner all [...] python-updater [...] --end of snip-- Again you can find nothing about these recommendations in the handbook in chapter "1.c. Maintaining Software" [4]. On the other hand you find there the advise to run "emerge --depclean" and revdep-rebuild" after an update of your complete system. Both topics touch stuff, which is (in my opinion) crucial for Gentoo: changing compile options (which includes updates of toolchain packages in my opinion) and maintaining your system via world updates (which could change the toolchain). More informations about this and some good practicing advices in the handbook would be great! Regards, Marc [1]http://www.gentoo.org/doc/en/gentoo-x86-quickinstall.xml [2]http://article.gmane.org/gmane.linux.gentoo.devel/33290/match=decision+remove+stage1+2+installation+documentation [3]http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=5#doc_chap5 [4]http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=2&chap=1#doc_chap3
*** Bug 140355 has been marked as a duplicate of this bug. ***
Hi, the code listing 2.38 in the x86 Quick Install Guide lists this code: --snip-- Code Listing 2.38: Last edit of make.conf mybox etc # nano -w make.conf (Set -march to your CPU type in CFLAGS) CFLAGS="-O2 -march=athlon-xp -pipe" (Add the following line) FEATURES="parallel-fetch ccache" (Only add the following if you know what you're doing) ACCEPT_KEYWORDS="~x86" --end of snip-- The CFLAGS option "-march=athlon-xp" is marked blue for special attention. The change of the CFLAGS is what I was trying to point at with this bug. The Gentoo Handbook says nothing about "to recompile your whole system twice to make full use" of the CFLAGS change. This comment about recompilation is not about ACCEPT_KEYWORDS="~x86", because moving to testing is more or less only an upgrade of your packages (of course there are special packages like gcc to care about). I just wanted to clarify this. Regards, Marc
Okay, I added a bit of information on why rebuilding is still a valid option, with a link pointing to the gcc upgrading guide for a more thorough discussion of rebuilding. Also updated some package names in light of 2006.1's release. Thanks for reporting.
