Specific GCC version per package basis

[ZekeMorrin]

Hello, how can I *properly* set package.env to use a specific version of gcc to compile a package? Without encountering linking issues etc..

I have both GCC 14 and 13 installed, I want to use GCC-13 for compiling cuda and opencv related packages, that includes;

media-libs/opencv
dev-util/nvidia-cuda-toolkit
sci-libs/caffe2

I couldn't find the correct solution in older posts.

Thanks!

[leonik375]

Did you try this?
https://forums.gentoo.org/viewtopic-p-7996118.html#7996118

[grknight]

Beware of errors stemming from C++ library mismatches if this is attempted.

[oneone]

I cannot answer your question as to how to do this properly with absolute certainty, but here is what I did in order to compile hyprland with gcc-14 and the rest of my system with my default compiler gcc-13.

File /etc/portage/env/compiler-gcc-14:

[Hu]

gcc-14 looks stable to me.

[freke]

Testing/mainly using gcc15 I've been using this for my /etc/portage/env/gcc14 for those packages that didn't yet play nice with gcc15

[sam_]

[freke]

[ZekeMorrin]

Thanks for all the good replies, these will be useful for me. And I second to that gcc-14 is pretty stable now, it's not even keyworded anymore. (~amd64)

I'll do it as @oneone did it;