Ошибка при компиляции примера библиотеки libcli

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
 
#include <libcli.h>
 
 
int cmd_test(struct cli_def *cli, char *command, char *argv[], int argc)
{
    int i;
    cli_print(cli, "called %s with \"%s\"", __FUNCTION__, command);
    cli_print(cli, "%d arguments:", argc);
    for (i = 0; i < argc; i++)
    {
        cli_print(cli, "        %s", argv[i]);
    }
    return CLI_OK;
}
//int banner();
 
int main(void) {
 struct cli_command *c;
    struct cli_def *cli;
    int sockfd;
    int acceptfd;
    struct sockaddr_in saddr, raddr;
    unsigned int on = 1;
    unsigned int rlen = sizeof(struct sockaddr_in);
    cli = cli_init();
    cli_set_banner(cli, "libcli test environment");
    cli_set_hostname(cli, "test");
 
    cli_register_command(cli, NULL, "test", cmd_test, PRIVILEGE_UNPRIVILEGED, MODE_EXEC, NULL);
 
    if((sockfd=socket(AF_INET, SOCK_STREAM, 0)) == -1) {
         perror("socket");
         exit(-1);
    }
    saddr.sin_port = htons(9090);
    saddr.sin_family = AF_INET;
    saddr.sin_addr.s_addr = INADDR_ANY;
    memset(&raddr, 0, sizeof(raddr));
    raddr.sin_family=AF_INET;
    if(setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) != 0) {
        perror("setsockopt");
        exit(-1);
    }
    if(bind(sockfd, (struct sockaddr*)&saddr, sizeof(saddr)) == -1) {
         perror("bind");
         exit(-1);
    }
    if(listen(sockfd, 12) != 0) {
         perror("listen");
         exit(-1);
    }
    while((acceptfd=accept(sockfd, (struct sockaddr*)&raddr, &rlen)) > 0) {
         while(cli_loop(cli, acceptfd) == 0);
    }
    return 0;
}

struct cli_command {
    char *command;
    int (*callback)(struct cli_def *, const char *, char **, int);
    unsigned int unique_len;
    char *help;
    int privilege;
    int mode;
    struct cli_command *next;
    struct cli_command *children;
    struct cli_command *parent;
};
 
struct cli_def *cli_init();
int cli_done(struct cli_def *cli);
struct cli_command *cli_register_command(struct cli_def *cli, struct cli_command *parent, const char *command,
                                         int (*callback)(struct cli_def *, const char *, char **, int), int privilege,
                                         int mode, const char *help);