Fix building with fribidi2

* configure.ac: Check for wcwidth and wchar.h.
* frm/common.c (get_charset): Aways allocate output_charset.
Provide a substitution for fribidi_wcwidth if it is not
available.
(puts_bidi): Use mu_fribidi_wcwidth.

@@ -409,7 +409,7 @@ AC_HEADER_DIRENT
 AC_CHECK_HEADERS(errno.h fcntl.h inttypes.h libgen.h limits.h\
  malloc.h obstack.h paths.h shadow.h socket.h sys/socket.h stdarg.h stdio.h\
  stdlib.h string.h strings.h sys/file.h sysexits.h syslog.h termcap.h\
- termios.h termio.h sgtty.h utmp.h utmpx.h unistd.h)
+ termios.h termio.h sgtty.h utmp.h utmpx.h unistd.h wchar.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
@@ -536,6 +536,8 @@ AH_BOTTOM([
 
 ## FriBidi support
 
+AC_CHECK_FUNCS(wcwidth)
+
 AC_SUBST(FRIBIDI_LIBS)
 
 use_fribidi=yes

@@ -62,10 +62,10 @@ static char *output_charset = NULL;
 const char *
 get_charset ()
 {
-  char *tmp;
-  
   if (!output_charset)
     {
+      char *tmp;
+      const char *str = NULL;
       char locale[32];
       
       memset (locale, 0, sizeof (locale));
@@ -86,16 +86,16 @@ get_charset ()
 	  
 	  lang = strtok_r (locale, "_", &sp);
 	  terr = strtok_r (NULL, ".", &sp);
-	  output_charset = strtok_r (NULL, "@", &sp);
+	  str = strtok_r (NULL, "@", &sp);
 
-	  if (output_charset)
-	    output_charset = xstrdup (output_charset);
-	  else
-	    output_charset = mu_charset_lookup (lang, terr);
+	  if (!str)
+	    str = mu_charset_lookup (lang, terr);
 	}
       
-      if (!output_charset)
-	output_charset = "ASCII";
+      if (!str)
+	str = "ASCII";
+
+      output_charset = xstrdup (str);
     }
   return output_charset;
 }
@@ -104,6 +104,20 @@ get_charset ()
 /* BIDI support (will be moved to lib when it's ready) */
 #ifdef HAVE_LIBFRIBIDI
 
+# ifdef HAVE_FRIBIDI_WCWIDTH
+#  define mu_fribidi_wcwidth fribidi_wcwidth
+# else
+#  if defined(HAVE_WCHAR_H) && defined(HAVE_WCWIDTH)
+#   include <wchar.h>
+#   define mu_fribidi_wcwidth(c) wcwidth((wchar_t)c)
+#  else
+#   undef HAVE_LIBFRIBIDI
+#  endif
+# endif
+#endif
+
+#ifdef HAVE_LIBFRIBIDI
+
 static int fb_charset_num = -1;
 FriBidiChar *logical;
 char *outstring;
@@ -170,7 +184,7 @@ puts_bidi (char *string)
 	      if (fb_charset_num != FRIBIDI_CHARSET_CAP_RTL)
 		{
 		  while (wid > 0 && idx < len)
-		    wid -= fribidi_wcwidth (visual[idx++]);
+		    wid -= mu_fribidi_wcwidth (visual[idx++]);
 		}
 	      else
 		{