https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60129
David Malcolm <dmalcolm at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> --- gcc 8 now underlines the pertinent parameter (as of r253411 and r253096 for C/C++ respectively): C: $ ./xgcc -B. -c t.c t.c: In function ‘fn2’: t.c:3:7: warning: passing argument 1 of ‘fn1’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers] fn1(a, a); ^ t.c:1:17: note: expected ‘char *’ but argument is of type ‘const char *’ extern void fn1(char*, char*); ^~~~~ t.c:3:10: warning: passing argument 2 of ‘fn1’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers] fn1(a, a); ^ t.c:1:24: note: expected ‘char *’ but argument is of type ‘const char *’ extern void fn1(char*, char*); ^~~~~ C++ (which also now underlines the pertinent argument, as of r256448): $ ./xg++ -B. -c t.c t.c: In function ‘void fn2(const char*)’: t.c:3:7: error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive] fn1(a, a); ^ t.c:1:17: note: initializing argument 1 of ‘void fn1(char*, char*)’ extern void fn1(char*, char*); ^~~~~ t.c:3:10: error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive] fn1(a, a); ^ t.c:1:24: note: initializing argument 2 of ‘void fn1(char*, char*)’ extern void fn1(char*, char*); ^~~~~