Recommended per package configs for testing programs

[ZekeMorrin]

Hello Gentoo community, I'd like to learn that if there are any recommended config files which will reside in /etc/portage/env for testing packages.
What I want to test is some packages compiled with LLVM/Clang and with ThinlLTO feature of Clang.

I've seen this guide https://wiki.gentoo.org/wiki/Package_testing for testing packages but it seems some of these flags here are GCC specific.

What I really want to test is, net-libs/nodejs package which I use it everyday, at the time I compiled this package the "lto" use flag was masked but I unmasked the use flag and compiled it with Clang + ThinLTO. Aside few compiling warnings, nothing seem out of ordinary. Since I compiled it and using it, also everything seems perfectly fine too.

I just want to be sure that in the background things are working as it's supposed to be. So I'd be happy if you can share some config files for per package basis and any tools that I can use for package testing.

And I can report my findings somewhere convenient for the community as well.

Thanks and happy coding ^_^

[Juippisi]

[ZekeMorrin]