topic ld: gives Duplicate Symbol error in Operating System - HP-UX

ld: gives Duplicate Symbol error

Satya_6 — Mon, 16 Oct 2006 06:58:25 GMT

Hi,

I recently upgraded my aCC compilers from A03.30 to A03.65 and with the new compiler I am getting a linker error of "Duplicate symbols" for some symbols. After some investiagation we could find that we get this problem because of the following explicit instantiation of a template class like
"template class vector;" in a header file.

I have removed this code and am able to build my projects, but still I get the same error with some other projects as well. Now I am confused as to what is the exact reason for this error, how my old compiler could get around some improper code constructs.

Can you please help to resolve this issue

TIA
Satya

Re: ld: gives Duplicate Symbol error

Peter Godron — Mon, 16 Oct 2006 07:06:20 GMT

Hi,
"problem" was fixed in 3.31, see
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=183174
and my own thread regarding this problem:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=72147

Also, suggestions at:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=139183

Re: ld: gives Duplicate Symbol error

Dennis Handly — Sat, 04 Nov 2006 05:35:05 GMT

>Peter "problem" was fixed in 3.31

In some of Peter's links it mentions don't put it in a .h file. This is correct. The C++ Standard doesn't allow multiple explicit instantiations, this would violate the ODR rule, 3.2.