Build Warning: Strict Aliasing

    QA Notice: Package has poor programming practices which may compile
               fine but exhibit random runtime failures.
    ...: warning: dereferencing type-punned pointer will break strict-aliasing rules

This warning crops up when code starts casting distinct pointer types and then dereferencing them. Generally, this is a violation of aliasing rules which are part of the C standard. Historically, these warnings did not show up as the optimization was not turned on by default. With gcc-4.1.x and newer though, the -O2 optimization level enables strict aliasing support. For information, please review these links: NetBSD Explanation, Gentoo Dev Thread, GCC Docs, Practical examples.

To fix this issue, use the methods proposed in the links mentioned earlier. If you're unable to do so, then a work around would be to append the gcc -fno-strict-aliasing flag to CFLAGS in the ebuild.