clang -O2  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/encrypt.c -o unistd/encrypt -D_POSIX_C_SOURCE=202405L  -lm  -lintl
unistd/encrypt.c:11:8: error: incompatible pointer types initializing 'void (*)(char *, int)' with an expression of type 'int (char *, int)' [-Werror,-Wincompatible-pointer-types]
void (*foo)(char [64], int) = encrypt;
       ^                      ~~~~~~~
1 error generated.