* lib/basename.c, lib/dirname.h, lib/dirname.c, lib/memrchr.c,

* lib/xstrndup.c, lib/strchr.c:
New, stolen from the Fileutils 4.1.
* lib/Makefile.am (libbison_a_SOURCES): Adjust.
* configure.in: Check for the presence of memrchr, strchr,
strnlen, and of their prototypes.
Don't check for strndup: we no longer use it.
* src/system.h: Adjust the prototypes.

lib/Makefile.am

@@ -1,4 +1,4 @@
-## Copyright 2001 Free Software Foundation, Inc.
+## Copyright 2001, 2002 Free Software Foundation, Inc.
 
 ## This program is free software; you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
@@ -29,6 +29,7 @@ INCLUDES = -I.. -I$(srcdir) -I../intl
 EXTRA_DIST = malloc.c realloc.c
 
 libbison_a_SOURCES = \
+  basename.c dirname.h dirname.c \
   getopt.h getopt.c getopt1.c \
   quote.h quote.c quotearg.h quotearg.c \
   xalloc.h xmalloc.c xstrdup.c