eliminate warnings from arlex.c

["Ben Elliston" <bje at au1 dot ibm dot com>]

The file arlex.c, generated from arlex.l, generates some warnings.
This patch silences those warnings.  The only part I am uncertain
about is the use of %option nounput.  This looks to be a flex-specific
option that may not be supported by other versions of lex(1).  Is this
true?  Does it really matter?

If it's okay, then I presume it's safe to cease defining YY_NO_UNPUT,
as this has no effect in the code generated by modern versions of
flex.

This is the last in a series of patches from me to eliminate warnings
from binutils.  On my systems, it now compiles rather silently with
make -s.


2004-12-08  Ben Elliston  <bje@au.ibm.com>

        * arlex.l: Use %option nounput instead of ..
        (YY_NO_UNPUT): Don't #define.
        (yylex, yyget_lineno, yyget_leng): Provide extern declarations.
        (yyget_in, yyget_out, yyget_text): Likewise.
        (yyset_lineno, yyset_in, yyset_out): Likewise.
        (yyget_debug, yyset_debug, yylex_destroy): Likewise.

Index: arlex.l
===================================================================
RCS file: /home/bje/src-cvs/src/binutils/arlex.l,v
retrieving revision 1.7
diff -u -p -r1.7 arlex.l
--- arlex.l	14 Sep 2003 12:20:16 -0000	1.7
+++ arlex.l	8 Dec 2004 03:04:16 -0000
@@ -1,7 +1,7 @@
 %{
 /* arlex.l - Strange script language lexer */
 
-/*   Copyright 1992, 1997, 2000, 2002, 2003 Free Software Foundation, Inc.
+/* Copyright 1992, 1997, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
 
 This file is part of GNU Binutils.
 
@@ -19,25 +19,34 @@ You should have received a copy of the G
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
+/* Contributed by Steve Chamberlain <sac@cygnus.com>.  */
 
-/* Contributed by Steve Chamberlain
-   		  sac@cygnus.com
-
-*/
 #define DONTDECLARE_MALLOC
 #include "ansidecl.h"
 #include "libiberty.h"
 #include "arparse.h"
 
-#define YY_NO_UNPUT
-
 extern int yylex (void);
+extern int yyget_lineno (void);
+extern int yyget_leng (void);
+extern FILE *yyget_in (void);
+extern FILE *yyget_out (void);
+extern char *yyget_text (void);
+extern void yyset_lineno (int);
+extern void yyset_in (FILE *);
+extern void yyset_out (FILE *);
+extern int yyget_debug (void);
+extern void yyset_debug (int);
+extern int yylex_destroy (void);
 
 int linenumber;
 %}
 
 %a 10000
 %o 25000
+
+/* Don't emit a yyunput function in the generated scanner.  */
+%option nounput
 
 %%

Attachment: signature.asc
Description: Digital signature