Hello, I just notice the man page has a little wrong information about the FEATURES "installsources": The path written in the man is /usr/src/debug/${CATEGORY}/${PF} but in fact, it's /usr/lib/debug/${CATEGORY}/${PF} I am currently using sys-apps/portage-2.2.8-r1 Thanks for support.
Well, sorry, I did kind of a mistake, my bad: Indeed, there is not "/usr/src/debug/" when compiling a package with FEATURES="installsources" if ... dev-util/debugedit is not installed before. And this is what was written in the man make.conf(5) "This feature works only if debugedit is installed [...]". But what about /usr/lib/debug/? After I installed debugedit and remerging the package, it actually worked. We can close this bug. Sorry for the noise. (But still, what is /usr/lib/debug/ then?)