cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration unistd/crypt.c -o unistd/crypt -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
unistd/crypt.c: In function ‘main’:
unistd/crypt.c:10:24: error: implicit declaration of function ‘crypt’ [-Wimplicit-function-declaration]
   10 |         char* hashed = crypt("foo", "ba");
      |                        ^~~~~
unistd/crypt.c:10:24: error: initialization of ‘char *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]