Fucking GCC warnings

request for implicit conversion from ‘void *’ to ‘struct keys *’ not permitted in C++

keys = mmap(0, sizeof(struct keys), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);

First: C99 code (-x c -std=c99).
Second: what is going on?

>>15
No, you're wrong. If the intent is to cast to a specific type, then you should indeed explicitly perform the cast.

The best software projects are the ones that compile error/warning free with -Wall -Wextra -Werror. Shit with thousands of warnings is not maintainable.