cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations signal/psiginfo.c -o signal/psiginfo -D_POSIX_C_SOURCE=202405L  -lm -lpthread  -liconv
signal/psiginfo.c:5:48: error: use of undeclared identifier 'psiginfo'; did you mean 'psignal'?
    5 | void (*foo)(const siginfo_t *, const char *) = psiginfo;
      |                                                ^~~~~~~~
      |                                                psignal
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/signal.h:103:6: note: 'psignal' declared here
  103 | void    psignal(int, const char *);
      |         ^
signal/psiginfo.c:5:8: error: incompatible function pointer types initializing 'void (*)(const siginfo_t *, const char *)' (aka 'void (*)(const struct __siginfo *, const char *)') with an expression of type 'void (int, const char *)' [-Wincompatible-function-pointer-types]
    5 | void (*foo)(const siginfo_t *, const char *) = psiginfo;
      |        ^                                       ~~~~~~~~
2 errors generated.