format.c: (in function fn)
format.c:3:3: Format string parameter to printf is not a compile-time constant:
                 fmt
format.c:5:3: Format string parameter to fprintf is not a compile-time
                 constant: fmt
format.c:6:3: Format string parameter to fprintf is not a compile-time
                 constant: fmt

Finished checking --- 3 code warnings, as expected

Finished checking --- no warnings