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-rw-r--r--posix/regex.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/posix/regex.c b/posix/regex.c
index a79597c542..f8544aebf0 100644
--- a/posix/regex.c
+++ b/posix/regex.c
@@ -66,8 +66,19 @@ char *malloc ();
 char *realloc ();
 #endif
 
-/* We used to test for `BSTRING' here, but only GCC and Emacs define
-   `BSTRING', as far as I know, and neither of them use this code.  */
+/* When used in Emacs's lib-src, we need to get bzero and bcopy somehow.
+   If nothing else has been done, use the method below.  */
+#ifdef INHIBIT_STRING_HEADER
+#if !(defined (HAVE_BZERO) && defined (HAVE_BCOPY))
+#if !defined (bzero) && !defined (bcopy)
+#undef INHIBIT_STRING_HEADER
+#endif
+#endif
+#endif
+
+/* This is the normal way of making sure we have a bcopy and a bzero.
+   This is used in most programs--a few other programs avoid this
+   by defining INHIBIT_STRING_HEADER.  */
 #ifndef INHIBIT_STRING_HEADER
 #if HAVE_STRING_H || STDC_HEADERS || defined (_LIBC)
 #include <string.h>
@@ -187,7 +198,7 @@ init_syntax_once ()
 #define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
 
 #ifndef NULL
-#define NULL 0
+#define NULL (void *)0
 #endif
 
 /* We remove any previous definition of `SIGN_EXTEND_CHAR',
@@ -2760,7 +2771,7 @@ at_endline_loc_p (p, pend, syntax)
 {
   const char *next = p;
   boolean next_backslash = *next == '\\';
-  const char *next_next = p + 1 < pend ? p + 1 : NULL;
+  const char *next_next = p + 1 < pend ? p + 1 : 0;
   
   return
        /* Before a subexpression?  */