This bug is to track packages that do not build with the sys-devel/mold linker.
I've talked with the author of mold and he pointed me out to this sheet. He already tries to build packages from gentoo repo and these are those who fails: https://docs.google.com/spreadsheets/u/1/d/1LnyrUw79oY5DxBNfXGmlxr2-0n4V0AA06BzbO2cdhZg/htmlview#gid=0