cc -pthread   -Wall -Wextra -Werror=implicit-function-declaration mqueue/mq_setattr.c -o mqueue/mq_setattr -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread   -liconv
mqueue/mq_setattr.c:5:10: fatal error: 'mqueue.h' file not found
    5 | #include <mqueue.h>
      |          ^~~~~~~~~~
1 error generated.