Re: bison-1.875: g++ and __attribute__ line

[Paul Eggert]

> Date: Sat, 4 Jan 2003 07:14:12 -0700 (MST)
> From: "Nelson H. F. Beebe" <address@hidden>

> No, it is not an issue of the gcc version;

Thanks for clarifying this.  I installed this patch:

2003-01-04  Paul Eggert  <address@hidden>

        * data/yacc.c (yyerrlab1): Omit attribute if __cplusplus is defined,
        since GNU C++ (as of 3.2.1) does not allow attributes on labels.
        Problem reported by Nelson H. F. Beebe.

--- data/yacc.c 3 Jan 2003 14:33:17 -0000       1.49
+++ data/yacc.c 5 Jan 2003 00:48:16 -0000       1.50
@@ -1115,7 +1115,10 @@ yyerrlab1:
      invokes YYERROR.  MacOS 10.2.3's buggy "smart preprocessor"
      insists on the trailing semicolon.  */
 #if defined (__GNUC_MINOR__) && 2093 <= (__GNUC__ * 1000 + __GNUC_MINOR__)
+  /* GNU C++ (as of version 3.2.1) does not allow attributes on labels.  */
+# ifndef __cplusplus
   __attribute__ ((__unused__));
+# endif
 #endif
 
 ]b4_location_if([  yylerrsp = yylsp;