Version 3.0.1 is available upstream. Please consider updating! It seems that version 3.0.1 is available upstream, while the latest version in the Gentoo tree is 2.3.4-r2. You think this warning is false? Read more about it here.
SystemC provides hardware-oriented constructs within the context of C++
as a class library implemented in standard C++. Its use spans design and
verification from concept to implementation in hardware and software.
SystemC provides an interoperable modeling platform which enables the
development and exchange of very fast system-level C++ models. It also
provides a stable platform for development of system-level tools.