Hello! ragel 6.10 is out for some time now. ragel-6.9 fails to compile with gcc-7.1, however ragel-6.10 has no problems whatsoever. The solution is simple: ragel-6.9.ebuild -> ragel-6.10.ebuild. I've already tested it in my local overlay - seems to work without problems. Thank you very much.
You wouldn't know it from the commit message, but this was fixed by commit 7e82798445c77c0901f21e1e224ff3779f73dfb7 Author: Luca Barbato <lu_zero@gentoo.org> AuthorDate: Fri Sep 1 09:08:40 2017 +0000 Commit: Luca Barbato <lu_zero@gentoo.org> CommitDate: Fri Sep 1 09:08:40 2017 +0000 Version bump