yacc.c, lalr1.cc: fix warnings about yynerrs

commit a166d5450e3f47587b98f6005f9f5627dbe21a5b
Author: Akim Demaille <[email protected]>
Date:   Tue Aug 2 08:45:25 2022 +0200

    yacc.c, lalr1.cc: fix warnings about yynerrs
   =20
    Most often yynerrs is not used.  Clang 15 now complains about such
    variables.  Bison itself does not compile:
   =20
    ```
    src/parse-gram.c:1797:9: error: variable 'gram_nerrs' set but not =
used [-Werror,-Wunused-but-set-variable]
        int yynerrs =3D 0;
            ^
    src/parse-gram.c:79:25: note: expanded from macro 'yynerrs'
                            ^
    1 error generated.
    ```
   =20
    Reported by Nikita Popov.
    Fixes https://github.com/akimd/bison/issues/89.
   =20
    * data/skeletons/yacc.c (yynerrs): Flag with YY_ATTRIBUTE_UNUSED.
    * data/skeletons/lalr1.cc (yynerrs_): Likewise.

diff --git a/THANKS b/THANKS
index 8ab72096..391b847e 100644
--- a/THANKS
+++ b/THANKS
@@ -46,8 +46,8 @@ Csaba Raduly              [email protected]
 Dagobert Michelsen        [email protected]
 Daniel Fru=C5=BCy=C5=84ski          [email protected]
 Daniel Galloway           [email protected]
-Daniela Becker            [email protected]
 Daniel Hagerty            [email protected]
+Daniela Becker            [email protected]
 David Barto               [email protected]
 David J. MacKenzie        [email protected]
 David Kastrup             [email protected]
@@ -143,6 +143,7 @@ Nick Bowler               [email protected]
 Nicolas Bedon             [email protected]
 Nicolas Burrus            [email protected]
 Nicolas Tisserand         [email protected]
+Nikita Popov              [email protected]
 Nikki Valen               [email protected]
 Noah Friedman             [email protected]
 Odd Arild Olsen           [email protected]
@@ -170,7 +171,6 @@ Quoc Peyrot               [email protected]
 R Blake                   [email protected]
 Raja R Harinath           [email protected]
 Ralf Wildenhues           [email protected]
-Ryan                      [email protected]
 Rich Wilson               [email protected]
 Richard Stallman          [email protected]
 Rici Lake                 [email protected]
@@ -179,6 +179,7 @@ Rob Vermaas               [email protected]
 Robert Anisko             [email protected]
 Robert Yang               [email protected]
 Roland Levillain          [email protected]
+Ryan                      [email protected]
 Satya Kiran Popuri        [email protected]
 Sebastian Setzer          [email protected]
 Sebastien Fricker         [email protected]
diff --git a/data/skeletons/lalr1.cc b/data/skeletons/lalr1.cc
index 240f4c36..4242b992 100644
--- a/data/skeletons/lalr1.cc
+++ b/data/skeletons/lalr1.cc
@@ -847,7 +847,7 @@ m4_if(b4_prefix, [yy], [],
     int yylen =3D 0;
=20
     // Error handling.
-    int yynerrs_ =3D 0;
+    int yynerrs_ YY_ATTRIBUTE_UNUSED =3D 0;
     int yyerrstatus_ =3D 0;
=20
     /// The lookahead symbol.
diff --git a/data/skeletons/yacc.c b/data/skeletons/yacc.c
index fd7e2c33..07a523b0 100644
--- a/data/skeletons/yacc.c
+++ b/data/skeletons/yacc.c
@@ -256,7 +256,7 @@ int yynerrs;]])])
 m4_define([b4_declare_parser_state_variables],
 [b4_pure_if([[
     /* Number of syntax errors so far.  */
-    int yynerrs]m4_ifval([$1], [ =3D 0])[;
+    int yynerrs YY_ATTRIBUTE_UNUSED]m4_ifval([$1], [ =3D 0])[;
 ]])[
     yy_state_fast_t yystate]m4_ifval([$1], [ =3D 0])[;
     /* Number of tokens to shift before error messages enabled.  */













commit 5555f4d05163316b8b5bddbdb172c0f5bae6f765
Author: Akim Demaille <[email protected]>
Date:   Tue Aug 2 09:00:47 2022 +0200

    regen

diff --git a/src/parse-gram.c b/src/parse-gram.c
index 400e89b7..b6ac083e 100644
--- a/src/parse-gram.c
+++ b/src/parse-gram.c
@@ -1,9 +1,9 @@
-/* A Bison parser, made by GNU Bison 3.8.1.  */
+/* A Bison parser, made by GNU Bison 3.8.2.30-82269.  */
=20
 /* Bison implementation for Yacc-like parsers in C
=20
-   Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2022 Free Software
-   Foundation, Inc.
+   Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2022 Free Software =
Foundation,
+   Inc.
=20
    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
@@ -46,10 +46,10 @@
    USER NAME SPACE" below.  */
=20
 /* Identify Bison output, and Bison version.  */
-#define YYBISON 30801
+#define YYBISON 30802
=20
 /* Bison version string.  */
-#define YYBISON_VERSION "3.8.1"
+#define YYBISON_VERSION "3.8.2.30-82269"
=20
 /* Skeleton name.  */
 #define YYSKELETON_NAME "yacc.c"
@@ -1794,7 +1794,7 @@ static YYLTYPE yyloc_default
 YYLTYPE yylloc =3D yyloc_default;
=20
     /* Number of syntax errors so far.  */
-    int yynerrs =3D 0;
+    int yynerrs YY_ATTRIBUTE_UNUSED =3D 0;
=20
     yy_state_fast_t yystate =3D 0;
     /* Number of tokens to shift before error messages enabled.  */
diff --git a/src/parse-gram.h b/src/parse-gram.h
index 55837bc4..5170e08c 100644
--- a/src/parse-gram.h
+++ b/src/parse-gram.h
@@ -1,8 +1,8 @@
-/* A Bison parser, made by GNU Bison 3.8.1.  */
+/* A Bison parser, made by GNU Bison 3.8.2.30-82269.  */
=20
 /* Bison interface for Yacc-like parsers in C
=20
-   Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2021 Free Software =
Foundation,
+   Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2022 Free Software =
Foundation,
    Inc.
=20
    This program is free software: you can redistribute it and/or modify