Specify alternate gcc version for specific packages?[SOLVED]

crowbert · Tux's lil' helper Joined: 28 Apr 2003 Posts: 140

I've switched to gcc 4.9, but I found that a few specific packages don't compile or work correctly with it. What I would like to do is keep the system default to 4.9, but specify that those particular packages are to be compiled with 4.8.

My thought was to use /etc/portage/package.env to specify different values for CC and CXX, but that doesn't seem to be working. I'm not sure if I'm just doing it wrong, or if invoking a different version of GCC is more complicated than just specifying the full version instead of just 'gcc'.

I would think the same technique should work for selecting icc or another compiler on a per-package basis. Has anyone gotten this working?

krinn · Watchman Joined: 02 May 2003 Posts: 7470

It get gcc by path, so switching PATH in the packge env file should be enough no?

crowbert · Tux's lil' helper Joined: 28 Apr 2003 Posts: 140

Ahh. Setting the path should work, but I found that just setting CC and CXX works, too.

My problem was that I had the wrong syntax in the package.env file, so it wasn't loading my variables.

crowbert · Tux's lil' helper Joined: 28 Apr 2003 Posts: 140

One more follow-up. It seems to depend a bit on the ebuild.

For media-tv/mythtv, I set CC and CXX (last I checked, it wouldn't build with gcc 4.9).
For www-client/chromium, it needs BUILD_CC and BUILD_CXX, at least with an older ebuild (I'm stuck on version 34 due to a pointer focus bug that makes newer versions unusable with my window manager).

Anyway, I've achieved what I need to ensure that I won't accidentally compile the packages in question with the wrong gcc.