Version 4.17 is available upstream. Please consider updating!
It seems that version 4.17 is available upstream, while the latest version in the Gentoo tree is 4.15-r1.
You think this warning is false? Read more about it here.

Available Versions

Versionamd64x86alphaarmarm64hppamipsppcppc64riscvsparc
4.15-r1  : 0 EAPI 7 amd64 x86?alpha?arm?arm64?hppa?mips ~ppc ~ppc64?riscv?sparc

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