The issue is that "const" didn't exist in the earliest forms of C... and even when it became available not everybody started using it. So you might have a func

The issue is that "const" didn't exist in the earliest forms of C... and even when it became available not everybody started using it. So you might have a function that doesn't have proper "const" qualifications in its prototype like: void my_log(char *message); and then call-sites like: my_log("Hello, World!"); ...and that needed to stay compiling.