Clang header file intrin.h declares the _BitScanForward as below.
static unsigned char _BitScanForward(unsigned long *_Index, unsigned long _Mask); When I include this header file and compile the source file, it is giving compilation error like below
error: inline function '_BitScanForward' is not defined [-Werror,-Wundefined-inline] _BitScanForward ( This is happening only in our code base but I am unable to reproduce this compilation error outside our environment.
Could somebody please explain what is this "-Wundefined-inline" mean?
Why is the question of "inline" coming into picture?
More Info: When put inline keyword just after static, its compiling without any issues