Hello Prasad, There is not enough information, so I am not sure. But what I guess is you probably use pair or map container as follows. map<SomeType , const BioSequence&> or pair<SomeType, const BioSequence&> What happens in stl_pair.h line 55 is bool operator==(const pair<T1,T2>& a, const pair<T1,T2>& b) { return ( a.first==b.first && b.second==b.second ); } So, you need operator== for BioSequence class. This code may be compiled without Cint if you do not use operator==. But it is a different story. Makecint instantiates every possible function in template library and triggers this kind of problem. There can be 2 solutions. 1. Define a dummy operator==, you already mention this. 2. Use #pragma link off statement to mask those errors I hope this information helps. Thank you Masaharu Goto >Dear masa and rooters, > > why this type of error is creeping..and how to avoid ??? >*************************************************************************** >/usr/include/g++-3/stl_pair.h: In function `bool operator== (const >pair<_T1, _T2> &, const pair<_T1, _T2> &) [with _T1 = const int, _T2 = >BioSequence]': >G__cpp_BioBhasha.C:37: instantiated from here >/usr/include/g++-3/stl_pair.h:55: no match for `const BioSequence & == >const BioSequence &' >/usr/include/g++-3/stl_tree.h:188: candidates are: bool operator== >(const _Rb_tree_base_iterator &, const _Rb_tree_base_iterator &) >/usr/include/g++-3/stl_pair.h: In function `bool operator< (const >pair<_T1, _T2> &, const pair<_T1, _T2> &) [with _T1 = const int, _T2 = >BioSequence]': >/usr/include/g++-3/stl_algobase.h:412: instantiated from >`lexicographical_compare (_InputIter1, _InputIter1, _InputIter2, _InputIter2) >[with _InputIter1 = _Rb_tree_iterator<pair<const int, BioSequence>, const >pair<const int, BioSequence> &, const pair<const int, BioSequence> *>, >_InputIter2 = _Rb_tree_iterator<pair<const int, BioSequence>, const pair<cons t >int, BioSequence> &, const pair<const int, BioSequence> *>]' >/usr/include/g++-3/stl_tree.h:776: instantiated from `operator< (const >_Rb_tree<_Key, _Value, _KeyOfValue, _Compare, _Alloc> &, const _Rb_tree<_Key, >_Value, _KeyOfValue, _Compare, _Alloc> &) [with _Key = int, _Value = pair<const >int, BioSequence>, _KeyOfValue = _Select1st<pair<const int, BioSequence> >, >_Compare = less<int>, _Alloc = __malloc_alloc_template<0>]' >G__cpp_BioBhasha.C:217: instantiated from here >/usr/include/g++-3/stl_pair.h:62: no match for `const BioSequence & < >const BioSequence &' >make: *** [G__cpp_BioBhasha.o] Error 1 >***************************************************************************** * * > > >thankyou for the help!. > >Do I have to do some dummy operator overloading for ==, <, >, * in my >BioSequence Class ??? > > >sincerely, >Prasad. > >-- >Be Happy, >Enjoy Life. >with love >shiva. >******************************************************************** >* If the Problem is Clear, the Solution is Near. ...shiva... * >******************************************************************** >
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