cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations stdlib/setkey.c -o stdlib/setkey -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic
stdlib/setkey.c:11:29: error: ‘setkey’ undeclared here (not in a function)
   11 | void (*foo)(const char *) = setkey;
      |                             ^~~~~~