[cfe-users] Why is clang defining NULL as __null ??

I have a .cpp file which has usage of *NULL* at several places. When I try to compile this cpp file for Android/x86 platform using clang++ on Windows machine + standalone tool chain, I am running into "expected expression" error at the places where *NULL* is used. I find the definition of *NULL* in

[cfe-users] error: inline function '_BitScanForward' is not defined

Hi Team, While compiling my source cpp file which is including intrin.h, clang is throwing the following error error: inline function '_BitScanForward' is not defined [-Werror,-Wundefined -inline] _BitScanForward ( I checked clang headers for definition but in clang intrin.h header file its jus