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yacc.c: do not use __attribute__ unprotected

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Reported by Victor Khomenko.
http://lists.gnu.org/archive/html/bug-bison/2013-04/msg00001.html

* data/glr.c (YYUSE, __attribute__): Fuse their definition into...
* data/c.m4 (b4_attribute_define): this new macro.
* data/yacc.c, data/glr.c: Use it.
This commit is contained in:
Akim Demaille
2013-04-08 10:39:48 +02:00
parent 657ed6d3be
commit 80a2826e69
5 changed files with 32 additions and 28 deletions
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5
NEWS
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@@ -2,6 +2,11 @@ GNU Bison NEWS
* Noteworthy changes in release ?.? (????-??-??) [?]
** Bug fixes
*** Fix compiler attribute portability (yacc.c)
With locations enabled, __attribute__ was used unprotected.
* Noteworthy changes in release 2.7 (2012-12-12) [stable]

1
THANKS
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@@ -121,6 +121,7 @@ Tom Tromey tromey@cygnus.com
Tommy Nordgren tommy.nordgren@chello.se
Troy A. Johnson troyj@ecn.purdue.edu
Tys Lefering gccbison@gmail.com
Victor Khomenko victor.khomenko@newcastle.ac.uk
Vin Shelton acs@alumni.princeton.edu
W.C.A. Wijngaards wouter@NLnetLabs.nl
Wayne Green wayne@infosavvy.com

28
data/c.m4
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@@ -187,9 +187,29 @@ m4_define([b4_table_value_equals],
[(!!(($2) == ($3)))])])
## ---------##
## Values. ##
## ---------##
## ----------------- ##
## Compiler issues. ##
## ----------------- ##
# b4_attribute_define
# -------------------
# Provide portability for __attribute__.
m4_define([b4_attribute_define],
[#ifndef __attribute__
/* This feature is available in gcc versions 2.5 and later. */
# if (! defined __GNUC__ || __GNUC__ < 2 \
|| (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
# define __attribute__(Spec) /* empty */
# endif
#endif
/* Suppress unused-variable warnings by "using" E. */
#if ! defined lint || defined __GNUC__
# define YYUSE(E) ((void) (E))
#else
# define YYUSE(E) /* empty */
#endif
])
# b4_null_define
@@ -405,7 +425,7 @@ m4_define([b4_c_arg],
## ----------- ##
# b4_sync_start(LINE, FILE)
# -----------------------
# -------------------------
m4_define([b4_sync_start], [[#]line $1 $2])

19
data/glr.c
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@@ -246,13 +246,6 @@ b4_percent_code_get[]dnl
# endif
#endif
/* Suppress unused-variable warnings by "using" E. */
#if ! defined lint || defined __GNUC__
# define YYUSE(E) ((void) (E))
#else
# define YYUSE(E) /* empty */
#endif
/* Identity function, used to suppress warnings about constant conditions. */
#ifndef lint
# define YYID(N) (N)
@@ -291,17 +284,7 @@ b4_percent_code_get[]dnl
# define YYLONGJMP(Env, Val) (longjmp (Env, Val), YYASSERT (0))
#endif
/*-----------------.
| GCC extensions. |
`-----------------*/
#ifndef __attribute__
/* This feature is available in gcc versions 2.5 and later. */
# if (! defined __GNUC__ || __GNUC__ < 2 \
|| (__GNUC__ == 2 && __GNUC_MINOR__ < 5))
# define __attribute__(Spec) /* empty */
# endif
#endif
]b4_attribute_define[
#ifndef YYASSERT
# define YYASSERT(Condition) ((void) ((Condition) || (abort (), 0)))

7
data/yacc.c
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@@ -447,12 +447,7 @@ typedef short int yytype_int16;
# endif
#endif
/* Suppress unused-variable warnings by "using" E. */
#if ! defined lint || defined __GNUC__
# define YYUSE(E) ((void) (E))
#else
# define YYUSE(E) /* empty */
#endif
]b4_attribute_define[
/* Identity function, used to suppress warnings about constant conditions. */
#ifndef lint