Hi, I have a question. I used '__builtin_ctz' function in arm compiler and it worked well, but I don't know which header file contains '__builtin_ctz' function. Do you know which header file is needed to use '__builtin_ctz' function?
as the name implies, a builtin is a compiler intrinsnic, they're not provided by a header. They are "builtin" to the compiler as it were.
Thank you for answering my question. Then can't I find the implementation of builtin functions?
not without the source code of the compiler. These aren't real functions, they are generated internally by the compiler.