cc -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 -lintl -liconv
unistd/encrypt.c:11:31: error: ‘encrypt’ undeclared here (not in a function)
   11 | void (*foo)(char [64], int) = encrypt;
      |                               ^~~~~~~