#ifdef _WIN32
//define something for Windows (32-bit and 64-bit, this part is common)
#ifdef _WIN64 //define something for Windows (64-bit only)
#else //define something for Windows (32-bit only) #endif
#elif __APPLE__
#include "TargetConditionals.h"
#if TARGET_IPHONE_SIMULATOR // iOS Simulator
#elif TARGET_OS_IPHONE// iOS device
#elif TARGET_OS_MAC// Other kinds of Mac OS
#else# error "Unknown Apple platform"
#endif
#elif __ANDROID__// android
#elif __linux__// linux
#elif __unix__ // all unices not caught above// Unix
#elif defined(_POSIX_VERSION)// POSIX
#else# error "Unknown compiler"#endif
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