undefined reference of library function

Question

i m trying to use DCMTK library built in MSVC in my qt application.although i have added libs in my .pro file like Libs+= -Ldcmtk/lib -ofstd -dcmdata..i have also include .h files of these libraries but i m getting undefined reference error for each function i m calling of these library.. what i m missing..

score 3 · Answer 1 · edited May 23 '17 at 12:20

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Function names are not the same in the libs - c++ standard does not define it so both msvc and g++ define them their own way.

Check this post. Qt/mingw32 undefined reference errors... unable to link a .lib

There are some work-arounds like this for instance (dll): http://www.emmestech.com/moron_guides/moron1.html

edited May 23 '17 at 12:20

Community

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answered Nov 30 '11 at 17:06

MasterPlanMan

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score 0 · Answer 2 · answered Jul 23 '10 at 09:19

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If you are getting an undefined reference error then you haven't linked to the correct library.

answered Jul 23 '10 at 09:19

Mike McQuaid

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i have checked for lib i m adding becouse i also have source code of tha lib. even if i have created my own lib say testlib and included its header & lib in .pro file i getting the same error. – user399932 Jul 23 '10 at 10:18

score 0 · Answer 3 · answered Jul 24 '10 at 19:15

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You use Qt Creator?

Say you have a lib file named libodbc32.a Then you should add a lib like this:

LIBS += -L [path to the libodbc32.a] -L [path to libsystemc.a] -lodbc32 -lsystemc

So I think you have linked not in an appropriate way.

answered Jul 24 '10 at 19:15

Narek

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undefined reference of library function

3 Answers3