How can I detect if I'm compiling for a 64bits architecture in C++

Question

In a C++ function I need the compiler to choose a different block if it is compiling for a 64 bit architecture.

I know a way to do it for MSVC++ and g++, so I\'ll po

Answer 1

This works for MSVC++ and g++:

#if defined(_M_X64) || defined(__amd64__)
  // code...
#endif