gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/psignal.c -o signal/psignal -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet -lsocket -latomic
signal/psignal.c:5:34: error: 'psignal' undeclared here (not in a function); did you mean 'signal'?
    5 | void (*foo)(int, const char *) = psignal;
      |                                  ^~~~~~~
      |                                  signal