Add missing includes for implicitly declared functions https://bugs.gentoo.org/875479 --- a/ping-apollo.c 2025-02-14 00:18:28.905559670 +0400 +++ b/ping-apollo.c 2025-02-14 00:19:59.617012294 +0400 @@ -9,6 +9,8 @@ #include <sys/time.h> #include <unistd.h> #include <linux/serial.h> +#include <stdlib.h> +#include <string.h> #define DEFAULT_DEVICE "/dev/ttyS0" #define MAXCHARS 128