According to http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html (search for Wextra ) that is an inherent part of -Wextra and can't be disabled separately (e.g. It isn't listed separately by its own -W option).
If it's not a real problem, and you can't change the library (I guess you can't or you'd have done so), you can disable warnings temporarily using the GCC diagnostic pragma.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.