cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations mqueue/O_EXCL.c -o mqueue/O_EXCL -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
mqueue/O_EXCL.c:2:10: fatal error: 'mqueue.h' file not found
#include <mqueue.h>
         ^~~~~~~~~~
1 error generated.