# include <stdlib.h>
#endif
-/* For platform which support the ISO C amendement 1 functionality we
+/* For platforms which support the ISO C amendment 1 functionality we
support user defined character classes. */
#if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
/* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>. */
# if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
/* The GNU C library provides support for user-defined character classes
- and the functions from ISO C amendement 1. */
+ and the functions from ISO C amendment 1. */
# ifdef CHARCLASS_NAME_MAX
# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
# else
extern int errno;
# endif
+# ifndef NULL
+# define NULL 0
+# endif
+
/* This function doesn't exist on most systems. */
# if !defined HAVE___STRCHRNUL && !defined _LIBC