C++: in windows 64-bit, and depending on your compiler, _WIN64 is defined for 64-bit compiles, and not if it's 32-bit. mingw-w64 can be detected by looking to see if __MINGW32__ is defined. it also #defines the __MINGW64_VERSION_MAJOR and __MINGW64_VERSION_MINOR if you need a compiler version (not sure if this corresponds to gcc version). also, with mingw and mingw-w64, __GNUC__ is defined as Firefox para Windows siempre ha sido un programa de 32 bits, y ahora el navegador es 64 bits, uniéndose a otros de la competencia como Internet Explorer y Google Chrome.. Recién estrenada la versión de 64 bits de Mozilla Firefox, solo está disponible para aquellas personas con Windows 7 o posterior.
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