Version 3.4.13 is available upstream. Please consider updating! It seems that version 3.4.13 is available upstream, while the latest version in the Gentoo tree is 3.4.9. You think this warning is false? Read more about it here.
astyle is a code formatter for C, C++, and Java source code, with many
granular formatting options to assist in enforcing code formatting
standards in projects.