Pre-defined Compiler Macros for OS

C or C++ code that needs to be ported across multiple operating systems will inevitably end up using pre-processor directives. These directives will look for the pre-defined macros defined by the compilers or OSes on which the code needs to be compiled or run.

• A comprehensive and updated list of the compiler macros for operating systems is here.

• For Windows: _WIN32

• For Linux: __linux__

• For UNIX: __unix__