FreeOrion-llvm/GG/GG/TextControl.h:233:12: warning: unelaborated friend declaration is a C++11 extension; specify 'class' to befriend 'GG::StateButton' [-Wc++11-extensions]
friend StateButton;
^
class
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All the patches I'll provide for freeorion will be released under the GPL v2 or later license.
Let's unleash the dyson forest powa!