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

An architecture-independent way to detect 32-bit and 64-bit builds in C and C++ looks like this:

// C
#include 

// C++
#include 

#if INTPTR_MAX == INT64_MAX
// 64-bit
#elif INTPTR_MAX == INT32_MAX
// 32-bit
#else
#error Unknown pointer size or missing size macros!
#endif