K 10 svn:author V 4 tijl K 8 svn:date V 27 2019-09-10T08:35:44.157747Z K 7 svn:log V 312 Define USE_LINUX keywords per Linux distribution (currently c6 and c7) so we can handle differences between distributions better and so we don't add dependencies on nonexistent ports when a package doesn't exist for a given distribution but set DEV_ERROR. Add a version constraint on the linux_base dependency. END