net-misc/can-utils-2023.03 overwrites CFLAGS/CXXFLAGS or adds uncommon ones

[asarubbo]

https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/

Issue: net-misc/can-utils-2023.03 overwrites CFLAGS/CXXFLAGS or adds uncommon ones.
Discovered on: amd64 (internal ref: pentoo_tinderbox)
System: GCC-14-SYSTEM (https://wiki.gentoo.org/wiki/Project:Tinderbox/Common_Issues_Helper#GCC-14)

Info about the issue:
https://wiki.gentoo.org/wiki/Project:Tinderbox/Common_Issues_Helper#QA0069

At the time of writing, github-cli does not support attachments. I'm using gists but they can be deleted at a certain point. If you want to save them, please create attachments on your own.

build log: https://gist.github.com/asarubbo/c6e5f042aa615223856e1903cf85e7d3