In file included from gram.y:12962:0:
scan.c: In function ‘yy_try_NUL_trans’:
scan.c:16246:23: warning: unused variable ‘yyg’ [-Wunused-variable]
With Clang, however, it looks like this:
scan.c:16246:23: warning: unused variable 'yyg' [-Wunused-variable]
struct yyguts_t * yyg = (struct yyguts_t*)yyscanner; /* This var may be unused depending upon options. */
Note that the "^" is directly underneath the offending variable "yyg" on the terminal emulator that generated this warning.