cc -pipe -O   -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/SIGRTMAX.c -o signal/SIGRTMAX -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lrt -lcrypt
signal/SIGRTMAX.c:3:2: error: #error "SIGRTMAX is not defined"
 #error "SIGRTMAX is not defined"
  ^~~~~