windows - Is it possible to check whether you are building for 64-bit with Microsoft C Compiler? -

windows - Is it possible to check whether you are building for 64-bit with Microsoft C Compiler? -

is there simple preprocessor macro defined 64-bit build? thought _win64 might have been it, when build 32-bit target, parts enclosed in #ifdef _win64 ... #endif compiled in, , causing problems. it's fri , can't think straight, i'm sure i'm overlooking simple here. maybe involving sizeof.

i have used _win64 check if 64 bit build.

n.b. _win32 (automatically) defined msvc in 64 bit builds, check _win64 before check _win32:

#if defined( _win64 ) // windows 64 bit code here #elif defined( _win32 ) // windows 32 bit code here #else // non-windows code here #endif

c windows 64bit visual-c++