gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/RTSIG_MAX.c -o limits/RTSIG_MAX -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet -lsocket -latomic
limits/RTSIG_MAX.c:4:2: error: #error "RTSIG_MAX is not defined"
    4 | #error "RTSIG_MAX is not defined"
      |  ^~~~~