cc -pthread  -Wall -Wextra -Werror=implicit-function-declaration sys_msg/msgsnd.c -o sys_msg/msgsnd -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
sys_msg/msgsnd.c:4:10: fatal error: sys/msg.h: No such file or directory
    4 | #include <sys/msg.h>
      |          ^~~~~~~~~~~
compilation terminated.