What predefined macro can be used to detect debug build with clang?

Question

MSVC defines _DEBUG in debug mode, gcc defines NDEBUG in release mode. What macro can I use in clang to detect whether the code is being compiled for r

Answer 1

You can use the __OPTIMIZE__ flag to determine if optimization is taking place. That generally means it is not a debug build since optimizations often rearrange the code sequence. Trying to step through optimized code can be confusing.

This probably is what those most interested in this question really are attempting to figure out.