cc -O2 -pipe -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/encrypt.c -o unistd/encrypt -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lstdthreads -lcrypt
unistd/encrypt.c:11:31: error: use of undeclared identifier 'encrypt'; did you mean 'crypt'?
   11 | void (*foo)(char [64], int) = encrypt;
      |                               ^~~~~~~
      |                               crypt
/usr/include/unistd.h:452:7: note: 'crypt' declared here
  452 | char    *crypt(const char *, const char *);
      |          ^
unistd/encrypt.c:11:8: error: incompatible function pointer types initializing 'void (*)(char *, int)' with an expression of type 'char *(const char *, const char *)' [-Wincompatible-function-pointer-types]
   11 | void (*foo)(char [64], int) = encrypt;
      |        ^                      ~~~~~~~
2 errors generated.