cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/lockf.c -o unistd/lockf -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
unistd/lockf.c:11:31: error: ‘lockf’ undeclared here (not in a function)
   11 | int (*foo)(int, int, off_t) = lockf;
      |                               ^~~~~