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Mar 11th, 2009
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duplicate symbol

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During a C++ script compilation, and doing exe building in AIX 5.3 using xlC compiler, I get the warning shown below:

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  1. ld: 0711-224 WARNING: Duplicate symbol: .NotNode::NotNode(BoolNode*)
  2. ld: 0711-224 WARNING: Duplicate symbol: .UnaryNode::UnaryNode(BoolNode*)
  3. ld: 0711-224 WARNING: Duplicate symbol: .OrNode::OrNode(BoolNode*,BoolNode*)
  4. ld: 0711-224 WARNING: Duplicate symbol: .BinaryNode::BinaryNode(BoolNode*,BoolNo
  5. de*)
  6. ld: 0711-224 WARNING: Duplicate symbol: .AndNode::AndNode(BoolNode*,BoolNode*)
  7. ld: 0711-224 WARNING: Duplicate symbol: .LeafNode::LeafNode(const char*)
  8. ld: 0711-224 WARNING: Duplicate symbol: .RegularExpression::RegularExpression(co
  9. nst char*)
  10. ld: 0711-224 WARNING: Duplicate symbol: .RegularExpression::Init(const char*)
  11. ld: 0711-224 WARNING: Duplicate symbol: .UnaryNode::~UnaryNode()
  12. ld: 0711-224 WARNING: Duplicate symbol: .UnaryNode::Dump(ostream&,int)
  13. ld: 0711-224 WARNING: Duplicate symbol: .UnaryNode::Visit(int,void*)
  14. ld: 0711-224 WARNING: Duplicate symbol: .BinaryNode::~BinaryNode()
  15. ld: 0711-224 WARNING: Duplicate symbol: .BinaryNode::Dump(ostream&,int)
  16. ld: 0711-224 WARNING: Duplicate symbol: .BinaryNode::Visit(int,void*)
  17. ld: 0711-224 WARNING: Duplicate symbol: .StringDictionaryIterator::operator void
  18. *()

The warning does not cause any problems in building EXE or during validation but too many warnings for building each EXE is annoying.

Can someone please help me on how to set the flag in Makefile so that this warning can be removed and build is done without this?
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Re: duplicate symbol

maybe you included the same header file more than once and left out the code guards.
Last edited by Ancient Dragon; Mar 11th, 2009 at 12:23 pm.
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Re: duplicate symbol

Is this valid?.. #pragma warning(disable:'warn code') ..:p
Last edited by cikara21; Mar 11th, 2009 at 2:24 pm.
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Re: duplicate symbol

>Is this valid?.. #pragma warning(disable:'warn code') ..:p
If you don't know what's causing a warning, you'd be a fool to disable it. I only know of one warning, on any compiler that I've ever used, where I'm 100% sure that it can be safely disabled. The correct response to a warning is understanding it and then fixing it.
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Re: duplicate symbol

Click to Expand / Collapse  Quote originally posted by Narue ...
>Is this valid?.. #pragma warning(disable:'warn code') ..:p
If you don't know what's causing a warning, you'd be a fool to disable it. I only know of one warning, on any compiler that I've ever used, where I'm 100% sure that it can be safely disabled. The correct response to a warning is understanding it and then fixing it.
yep..I just trying to set the flag not to understand it and fix it..Maybe u can fix it.:p
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Re: duplicate symbol

>I just trying to set the flag not to understand it and fix it
Clearly. That's why I felt the need to tell you that disabling a warning without understanding it is the height of stupidity. You're not stupid, are you?
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Re: duplicate symbol

Thank u very much sir..Don't know how to solve the problems sir..Could u tell us sir..:p
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Re: duplicate symbol

That attitude isn't likely to make you any friends.
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Re: duplicate symbol

The problem could be the result of several different things, and no one can tell you specifically without seeing the code. Another possible cause, besides the ones I already mentioned previously, is putting the implementation code in a header file. In that case it will be duplicated in every *.cpp file that uses the header file, thus the duplicate error message(s). The solution is to put the implementation code in one *.cpp file, leaving only the class declaration in the header file.
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Re: duplicate symbol

Click to Expand / Collapse  Quote originally posted by Narue ...
That attitude isn't likely to make you any friends.
that's ok..I'm sorry..
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This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.
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