cc -O2 -pipe  -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/SIGQUEUE_MAX.c -o limits/SIGQUEUE_MAX -D_POSIX_C_SOURCE=202405L  -lm -lpthread 
limits/SIGQUEUE_MAX.c:4:2: error: "SIGQUEUE_MAX is not defined"
#error "SIGQUEUE_MAX is not defined"
 ^
1 error generated.