* defs.h: Declare argument of re_comp as const char *.

gdb/ChangeLog

@@ -1,5 +1,7 @@
 Mon Sep 20 14:53:11 1993  Jim Kingdon  (kingdon@lioth.cygnus.com)
 
+	* defs.h: Declare argument of re_comp as const char *.
+
 	* remote.c, remote-mips.c: Use sr_get_debug not remote_debug.
 
 	* README: Say using bfd from another release doesn't generally work.

gdb/defs.h

@@ -265,10 +265,12 @@ perror_with_name PARAMS ((char *));
 extern void
 print_sys_errmsg PARAMS ((char *, int));
 
-/* From regex.c */
+/* From regex.c or libc.  BSD 4.4 declares this with the argument type as
+   "const char *" in unistd.h, so we can't declare the argument
+   as "char *".  */
 
 extern char *
-re_comp PARAMS ((char *));
+re_comp PARAMS ((const char *));
 
 /* From symfile.c */