gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/psiginfo.c -o signal/psiginfo -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lxnet -lsocket -latomic
signal/psiginfo.c:5:48: error: 'psiginfo' undeclared here (not in a function); did you mean 'siginfo_t'?
    5 | void (*foo)(const siginfo_t *, const char *) = psiginfo;
      |                                                ^~~~~~~~
      |                                                siginfo_t