Resolve All Build Warnings

We need to resolve all build warnings of our binaries using our official Docker via make and cmake. Compiler warnings are very often if not always indicative of potential or certain problems existing within the source. This is the beginning effort to remove warning for all platform compilations and supported compilers in the effort to strengthen the code.

Start with the repository's official Docker build invoked through make and cmake, then inventory warnings for the binaries across supported compiler and platform configurations. Use the compiler diagnostics to locate affected source areas; done means the builds complete without warnings in those configurations.

Written by the indexing model from the issue text.