How should I switch to gcc3.1?

dr_strange · Posted: Sun Jul 07, 2002 8:04 am Post subject: How should I switch to gcc3.1?

Forgive me for this very noob question, but once I've emerged gcc3.1, how do I switch to it? I have ecited the symlink in /etc/make.profile to point at /usr/portage/profiles/default-1.0-gcc3, still gcc --version tells me I've got gcc2.95, and if I try to emerge anything, it tells me that the compiler cannot make executables. What did I miss?

thanks a lot

rac · Posted: Sun Jul 07, 2002 8:23 am Post subject:

If you have emerged gcc 3.1 alongside 2.95.3, you should have both compilers installed on your system. The executables for 3.1 will have a -3.1 suffix, like gcc-3.1, g++-3.1, cxxfilt-3.1, etc, so you can invoke them explicitly that way.

For lots of software (esp. that that uses autoconf), you can set the environment variable CC to use 3.1. For example, you could put CC=gcc-3.1 into your make.conf and many newly emerged packages will use GCC 3.1.

If you do not have a /usr/bin/gcc-3.1 executable, the gcc 3.1 emerge did not complete correctly. Try to check the contents of it with

dr_strange · Posted: Sun Jul 07, 2002 8:45 am Post subject:

thank you very much, I"ll investigate this

nevil · n00b Joined: 07 Jul 2002 Posts: 11

Maybe you have an incorrect -march in your /etc/make.conf?
That produce the "cannot make executables" error for me.

dr_strange · Posted: Mon Jul 08, 2002 6:04 pm Post subject:

I have athlon-xp

yesterday I have merged gcc3.1.1, I'll see what happens

dr_strange · Posted: Tue Jul 09, 2002 8:24 am Post subject:

well, it did not work, emerge system borked on ncurses
so I reinstalled from scratch from a 1.3a iso, using stage 2 tarball
so far so good, though X and KDE are still before me

what I noticed is, that although I specified athlon-xp optimization settings in my make.conf before emerging system, 90% of the apps still were compiled with -mcpu=i686 -O2; are my settings overridden by the ebuilds, or did I miss something?