cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_socket/MSG_CMSG_CLOEXEC.c -o sys_socket/MSG_CMSG_CLOEXEC -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt 
relibc getrlimit(3, 0x7ffffffffc80): not implemented
relibc getrlimit(3, 0x7ffffffffbb0): not implemented
relibc getrlimit(9, 0x7ffffffffb70): not implemented
relibc getrlimit(9, 0x7ffffffffba0): not implemented
relibc getrlimit(5, 0x7ffffffffba0): not implemented
relibc getrlimit(9, 0x7ffffffffb70): not implemented
sys_socket/MSG_CMSG_CLOEXEC.c:2:17: error: 'MSG_CMSG_CLOEXEC' undeclared here (not in a function); did you mean 'SOCK_CLOEXEC'?
    2 | int const foo = MSG_CMSG_CLOEXEC;
      |                 ^~~~~~~~~~~~~~~~
      |                 SOCK_CLOEXEC