cc -pthread -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/MQ_PRIO_MAX.c -o limits/MQ_PRIO_MAX -D_POSIX_C_SOURCE=202405L -lm -lpthread -liconv limits/MQ_PRIO_MAX.c:5:2: error: "MQ_PRIO_MAX is not defined" 5 | #error "MQ_PRIO_MAX is not defined" | ^ 1 error generated.