Detect if build is 32 or 64 bit

[J Decker]

How do I detect if a build is 32 or 64 bit; mostly my code doesn't care these days... but it is sometimes needed to define __64__ for 64 bit builds.  In this case especially for mac.where kevent has two different structures.  

[J Decker]

On Thursday, September 14, 2017 at 4:12:42 PM UTC-7, J Decker wrote:

How do I detect if a build is 32 or 64 bit; mostly my code doesn't care these days... but it is sometimes needed to define __64__ for 64 bit builds.  In this case especially for mac.where kevent has two different structures.  

Nevermind, I had code to check via predefined compiler symbols...

Found this list on https://developer.apple.com/library/content/documentation/Porting/Conceptual/PortingUnix/compiling/compiling.html

• __i386__—Intel (32-bit)

• __x86_64__—Intel (64-bit)

• __ppc__—PowerPC (32-bit)

• __ppc64__—PowerPC (64-bit)

• __BIG_ENDIAN__—Big endian CPU

• __LITTLE_ENDIAN__—Little endian CPU

• __LP64__—The LP64 (64-bit) data model