A problem I have with USE flags in Portage is that, sometimes, a lot of unneeded stuff is installed when I install a given ebuild, just because one of its dependencies has some unneeded USE flag on.
Searching in Google, I found some Gentoo users saying they wonder if Portage could make the installation of packages extensions (activated by USE flags) similar to the way the things are made in e.g. Debian packages, i.e., if I install a given "program" with a given USE flag "extensionA" on, and if this USE flag results in production of additional files, then pack theses files separately (in Debian convention, we would have a package "program-common", with the basic stuff, and a package "program-extensionA", with those additional files). In my previous message, when I wrote about the possibility of a single Recipe to provide several Packages, I'm thinking in this approach. In the GCC case, the same Recipe could provide the basic Package for GCC, and separate Packages with additional stuff for GFortran, GCJ, etc. In the Vim case, we could have a basic Package for Vim and another one with additional files for GVim. Following this idea, we could also make the Linux kernel Recipe to provide the version-corresponding Linux-Headers Package, too.
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