I have a simple project that I built to track down a bizarre problem.
In my applicationDidFinishLaunching:, I call isdigit().
If I add a C Flag such as -DBUILD_RETAIL or a preprocessor macro such as BUILD_RETAIL=1, then I get:
Implicitly declaring library function 'isdigit' with type 'int (int)'
This happens even if I add #import <ctype.h> to the .m file.
I am on 10.15.7 with Xcode 12.4
In my applicationDidFinishLaunching:, I call isdigit().
If I add a C Flag such as -DBUILD_RETAIL or a preprocessor macro such as BUILD_RETAIL=1, then I get:
Implicitly declaring library function 'isdigit' with type 'int (int)'
This happens even if I add #import <ctype.h> to the .m file.
I am on 10.15.7 with Xcode 12.4
