link problems in GCC 3.3

[Miguel Bernal]

Hi

  I upgrade my GCC from 2.95 to 3.3, I actually use Slackware 8.1,
when i had GCC 2.95 I compiled some programs that I made was ok,
now i have GCC 3.3 and when I try to compile these programs apears an 
error.

  The source's syntaxis is correct, when i make te object (.o file),
works fine, but when i link the objetcs the lasts lines of the output ar
...
...
main.o(.gnu.linkonce.t._ZN12smart_objectI4TDibED0Ev+0x26): In function
`smart_object<TDib>::~smart_object [in-charge deleting]()':
../common/smart.h:107: referencia a `TDib::~TDib [in-charge]()' sin definir
collect2: ld devolvió el estado de salida 1


almost all lines of the erorr said thath the function X in reference with Y is
undefined.

what's wrong with it?
what can i do?

Thank you

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