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diff -urN bison-1.875-old/data/yacc.c bison-1.875-new/data/yacc.c
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--- bison-1.875-old/data/yacc.c 2002-12-28 09:36:02.000000000 +0100
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+++ bison-1.875-new/data/yacc.c 2003-07-16 15:26:30.000000000 +0200
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@@ -1114,8 +1114,10 @@
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/* Suppress GCC warning that yyerrlab1 is unused when no action
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invokes YYERROR. */
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#if defined (__GNUC_MINOR__) && 2093 <= (__GNUC__ * 1000 + __GNUC_MINOR__)
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+#if ! defined(__cplusplus)
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__attribute__ ((__unused__))
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#endif
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+#endif
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]b4_location_if([ yylerrsp = yylsp;
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*++yylerrsp = yyloc;])[
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