clang -O2   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations fcntl/F_OFD_SETLKW.c -o fcntl/F_OFD_SETLKW -D_POSIX_C_SOURCE=202405L  -lm   -lintl
fcntl/F_OFD_SETLKW.c:3:2: error: "F_OFD_SETLKW is not defined"
#error "F_OFD_SETLKW is not defined"
 ^
1 error generated.