--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,15 @@
+2006-07-28  Bruno Haible  <bruno@clisp.org>
+
+	* mbchar.h (iswalnum, iswalpha, iswblank, iswcntrl, iswdigit, iswgraph,
+	iswlower, iswprint, iswpunct, iswspace, iswupper, iswxdigit): Define
+	fallbacks.
+	Avoids link error on FreeBSD 4.x.
+	Reported by Yoann Vandoorselaere <yoann.v@prelude-ids.com>.
+
+	* wcwidth.h (iswprint): Assume an ASCII compatible wide character
+	encoding.
+	* mbswidth.c (iswcntrl): Likewise.
+
 2006-07-28  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* modechange.c (mode_compile): Numeric modes now affect setuid and

--- a/lib/mbchar.h
+++ b/lib/mbchar.h
@@ -157,6 +157,115 @@
 #include <wchar.h>
 
 #include <wctype.h>
+/* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
+   Assume all 12 functions are implemented the same way, or not at all.  */
+#if !defined iswalnum && !HAVE_ISWCNTRL
+ststic inline int
+iswalnum (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? (wc >= '0' && wc <= '9') || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')
+	  : 0);
+}
+#endif
+#if !defined iswalpha && !HAVE_ISWCNTRL
+ststic inline int
+iswalpha (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'
+	  : 0);
+}
+#endif
+#if !defined iswblank && !HAVE_ISWCNTRL
+ststic inline int
+iswblank (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? wc == ' ' || wc == '\t'
+	  : 0);
+}
+#endif
+#if !defined iswcntrl && !HAVE_ISWCNTRL
+ststic inline int
+iswcntrl (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? (wc & ~0x1f) == 0 || wc == 0x7f
+	  : 0);
+}
+#endif
+#if !defined iswdigit && !HAVE_ISWCNTRL
+ststic inline int
+iswdigit (wint_t wc)
+{
+  return (wc >= '0' && wc <= '9');
+}
+#endif
+#if !defined iswgraph && !HAVE_ISWCNTRL
+ststic inline int
+iswgraph (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? wc >= '!' && wc <= '~'
+	  : 1);
+}
+#endif
+#if !defined iswlower && !HAVE_ISWCNTRL
+ststic inline int
+iswlower (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? wc >= 'a' && wc <= 'z'
+	  : 0);
+}
+#endif
+#if !defined iswprint && !HAVE_ISWCNTRL
+ststic inline int
+iswprint (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? wc >= ' ' && wc <= '~'
+	  : 1);
+}
+#endif
+#if !defined iswpunct && !HAVE_ISWCNTRL
+ststic inline int
+iswpunct (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? wc >= '!' && wc <= '~'
+	    && !((wc >= '0' && wc <= '9')
+		 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'))
+	  : 1);
+}
+#endif
+#if !defined iswspace && !HAVE_ISWCNTRL
+ststic inline int
+iswspace (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? wc == ' ' || wc == '\t'
+	    || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r'
+	  : 0);
+}
+#endif
+#if !defined iswupper && !HAVE_ISWCNTRL
+ststic inline int
+iswupper (wint_t wc)
+{
+  return (wc >= 0 && wc < 128
+	  ? wc >= 'A' && wc <= 'Z'
+	  : 0);
+}
+#endif
+#if !defined iswxdigit && !HAVE_ISWCNTRL
+ststic inline int
+iswxdigit (wint_t wc)
+{
+  return (wc >= '0' && wc <= '9') || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F');
+}
+#endif
 
 #include "wcwidth.h"
 

--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,3 +1,7 @@
+2006-07-28  Bruno Haible  <bruno@clisp.org>
+
+	* mbchar.m4 (gl_MBCHAR): Also test for iswcntrl.
+
 2006-07-27  Bruno Haible  <bruno@clisp.org>
 
 	* stdint.m4 (gl_STDINT_H): Define __STDC_CONSTANT_MACROS during the

--- a/m4/mbchar.m4
+++ b/m4/mbchar.m4
@@ -1,5 +1,5 @@
-# mbchar.m4 serial 2
-dnl Copyright (C) 2005 Free Software Foundation, Inc.
+# mbchar.m4 serial 3
+dnl Copyright (C) 2005-2006 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -16,5 +16,7 @@
   dnl Compile mbchar.c only if HAVE_WCHAR_H && HAVE_WCTYPE_H.
   if test $ac_cv_header_wchar_h = yes && test $ac_cv_header_wctype_h = yes; then
     AC_LIBOBJ([mbchar])
+    dnl Prerequisites of mbchar.h and mbchar.c.
+    AC_CHECK_FUNCS([iswcntrl])
   fi
 ])