cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/SIGRTMIN.c -o signal/SIGRTMIN -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
signal/SIGRTMIN.c:3:2: error: "SIGRTMIN is not defined"
    3 | #error "SIGRTMIN is not defined"
      |  ^
1 error generated.