Index: popt-1.16/popt.3
===================================================================
--- popt-1.16.orig/popt.3	2010-05-13 04:58:04.357009234 +0100
+++ popt-1.16/popt.3	2010-05-13 04:58:09.716009057 +0100
@@ -657,21 +657,22 @@
 .nf
 #include <popt.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 void usage(poptContext optCon, int exitcode, char *error, char *addl) {
     poptPrintUsage(optCon, stderr, 0);
-    if (error) fprintf(stderr, "%s: %s\n", error, addl);
+    if (error) fprintf(stderr, "%s: %s\\n", error, addl);
     exit(exitcode);
 }
 
 int main(int argc, char *argv[]) {
-   char    c;            /* used for argument parsing */
+   int     c;            /* used for argument parsing */
    int     i = 0;        /* used for tracking options */
-   char    *portname;
    int     speed = 0;    /* used in argument parsing to set speed */
    int     raw = 0;      /* raw mode? */ 
    int     j;
    char    buf[BUFSIZ+1];
+   const char *portname;
    poptContext optCon;   /* context for parsing command-line options */
 
    struct poptOption optionsTable[] = {