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CoreOS is a fork of ChromeOS, not Gentoo. Both just happen to use emerge. It might poach some Gentoo packages to save work (I don't recall off hand) but build a

CoreOS is a fork of ChromeOS, not Gentoo. Both just happen to use emerge. It might poach some Gentoo packages to save work (I don't recall off hand) but build and usage is very different from Gentoo. Importantly, emerge is build-time trivia and has no bearing on the final product; there is not even an emerge binary in a CoreOS image. (I've seen this meme before, with people - not you - dismissing CoreOS because it's "based on Gentoo," due to the presence of emerge in the build. Pass this clarifying point on to your friends.)

mrpdaemon 11y ago
CoreOS is built using Gentoo. Gentoo is a meta-distribution whose main contribution is the portage tree which is a collective of ebuilds that describe how to build each individual package, the dependencies, the configuration flags etc. Literally every user who uses Gentoo builds and produces their own linux distribution, with their own CFLAGS, USE flags etc. ChromeOS is built using Gentoo, so is CoreOS. Neither ChromeOS nor CoreOS are Gentoo based distros because Gentoo is a toolkit to build distributions, not a distribution itself.