How to disable the "did you mean ..." suggestions in gcc? : Besides forced colors by default (which could be turned with `GCC_COLORS=`), newer gccs come with another irritating misfeature: they try to second-guess me, and drown warnings about real problems with "did you mean?" google / artificial stupidity -like spam garbage.

Example:
```
$ gcc -Wall -c -o /dev/null -xc - <<'EOT'
#include <stdlib.h>

void foo(char *b, size_t z){ readlink("/foo", b, z); }
EOT
<stdin>: In function ‘foo’:
<stdin>:3:30: warning: implicit declaration of function ‘readlink’;
did you mean ‘realloc’? [-Wimplicit-function-declaration]
```
No baby, I did not mean `realloc`; I just forgot to include the `unistd.h` header.

Is there any way to turn this OFF?

eg have it print just `implicit declaration of function ‘readlink’ [-Wimplicit-function-declaration]`, without the helpful suggestion?