cc -O2 -pthread -I/usr/local/include  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations fcntl/S_IRWXU.c -o fcntl/S_IRWXU -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt -L/usr/local/lib  -lintl -lcrypt
fcntl/S_IRWXU.c:3:2: error: #error "S_IRWXU is not defined"
    3 | #error "S_IRWXU is not defined"
      |  ^~~~~