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multiple definition of `yyerror'

Answer 1

A:

Mm, I'm not sure, but "yyerror" is a user-supplied function (for Bison). If you fiddle with the

%name_prefix

option, for example

%name_prefix my_cool_parser_

you can make it use "my_cool_parser_error" instead of yyerror. If you try doing this, does it help resolve where the error lies?

Kinopiko 2009-10-11 06:50:46

Answer 2

+2 A:

You need the following ld(1) option:

    -y symbol
   --trace-symbol=symbol
       Print the name of each linked file in which symbol  appears.   This
       option  may  be  given  any number of times.  On many systems it is
       necessary to prepend an underscore.

You can feed this through the cc(1) front end via -Wl,option

   -Wl,option
       Pass option as an option to the linker.  If option contains commas,
       it is split into multiple options at the commas.

So, cc -Wl,--trace-symbol=yyerror ...

DigitalRoss 2009-10-11 08:18:39

i am not sure what thats suppose to do but i tried it and it did not work. I cant tell if theres an option to remove it or not... very weird. I dont know how to replace their very basic yyerror(...){print("syntax error"); } solution

acidzombie24 2009-10-12 03:39:00

Could you be more specific about "it did not work"? It will most certainly print every encounter with yyerrror (you *might* need `-Wl,--trace-symbol=_yyerror` but not on x86 linux) and, given that yyerror is multiply defined, won't printing every encounter simply tell you directly where the problem is? (I bet you are building with `-ly` on the `cc` line. Try leaving that out too.)

DigitalRoss 2009-10-12 04:01:36

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