...\boost\throw_exception.hpp(3) : warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
...\boost\throw_exception.hpp(3) : warning C4668: 'GNUC_MINOR' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
...\boost\exception\exception.hpp(8) : warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
...\boost\exception\exception.hpp(8) : warning C4668: 'GNUC_MINOR' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
This PR fixes a couple of MSVC C4668 warnings:
...\boost\throw_exception.hpp(3) : warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
...\boost\throw_exception.hpp(3) : warning C4668: 'GNUC_MINOR' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
...\boost\exception\exception.hpp(8) : warning C4668: 'GNUC' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'
...\boost\exception\exception.hpp(8) : warning C4668: 'GNUC_MINOR' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'