cc -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/F_ULOCK.c -o unistd/F_ULOCK -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt  -lintl -liconv
unistd/F_ULOCK.c:8:17: error: ‘F_ULOCK’ undeclared here (not in a function); did you mean ‘F_OK’?
    8 | int const foo = F_ULOCK;
      |                 ^~~~~~~
      |                 F_OK