#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>

void doit( const char *str_name ) {
	int ret;
	struct in6_addr address;
	ret = inet_pton( AF_INET6, str_name, &address );
	if (ret <= 0) {
		fprintf( stderr, "inet_pton failed, str_name = %s, ret = %d\n", str_name, ret );
		exit(1);
	}

	printf( "IN6_IS_ADDR_V4COMPAT( %s ) = %s\n", str_name, IN6_IS_ADDR_V4COMPAT( &address ) ? "true" : "false" );
}

int main () {
	doit("::1");
	doit("::");
}