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POC++ undefined reference when linking
 

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    <p>Im wondering if anyone would be able to help me as I have been scratching my head for two days on this.</p> <p>I have done the compilation and when trying to link a source code on linux getting <em>undefined reference</em></p> <p>Compiling using,</p> <blockquote> <p>g++ -g -I/u01/kasunt/workspace/corelibCORBA/include -I/u01/kasunt/workspace/corelibCORBA/installed_components/include -I/u01/kasunt/workspace/corelibCORBA/idl -I/u01/kasunt/workspace/corelibCORBA/src/Server -I/u01/kasunt/workspace/corelibCORBA/installed_components/idl -I/u01/kasunt/workspace/corelibCORBA/installed_components/src/Server -I/u01/kasunt/workspace/corelibCORBA/installed_components/imake -DNARROWPROTO -I . -I/u01/kasunt/workspace/corelibCORBA/installed_components/include -W -Wall -Wpointer-arith -pipe -D_POSIX_THREADS -D_POSIX_THREAD_SAFE_FUNCTIONS -g -O -I/u01/kasunt/workspace/corelibCORBA/include -g -O -I/u01/kasunt/workspace/corelibCORBA/include -fvisibility=hidden -fvisibility-inlines-hidden -DACE_GCC_HAS_TEMPLATE_INSTANTIATION_VISIBILITY_ATTRS=1 -W -Wall -Wpointer-arith -ggdb -pipe -Wall -g -D__linux__ -D__x86__ -rdynamic -D_REENTRANT -DTAO_HAS_INTERCEPTORS=0 -DTAO_HAS_VALUETYPE=1 -D_REENTRANT -DACE_HAS_AIO_CALLS -D_GNU_SOURCE -I/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers -I/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/TAO -I/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/TAO/orbsvcs -DACE_HAS_EXCEPTIONS -D__ACE_INLINE__ -c -o TestSeqWrapper.o TestSeqWrapper.cpp</p> </blockquote> <p>Linking using,</p> <blockquote> <p>g++ -o TestSeqWrapper TestSeqWrapper.o -g -L/u01/kasunt/workspace/corelibCORBA/lib -L/u01/kasunt/workspace/corelibCORBA/installed_components/lib -g -O -Wl,-E -L/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/lib -L/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/lib -L/usr/local/ACE+TAO+CIAO-5.7.9/ACE_wrappers/TAO/tao -L/u01/kasunt/workspace/corelibCORBA/installed_components/idl -lcorelibCORBA -lcorelibCORBA /u01/kasunt/workspace/corelibCORBA/installed_components/lib/corelibCORBA3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/CorbaController3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/EConcurrency3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/corelibLogger3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/LeakTracker3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/trace3r.lib -lDefineTimeZone /u01/kasunt/workspace/corelibCORBA/installed_components/lib/timestamp3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/ApplConfig3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/appl3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/logstream3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/disklog3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/timeout3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/getpnam3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/config3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/strl3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/string3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/command3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/cmdargs3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/CppUtils3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/BuildTag3r.lib /u01/kasunt/workspace/corelibCORBA/installed_components/lib/exception3r.lib <strong>-lCorbaIdl</strong> -lTAO_Valuetype -lTAO_PortableServer -lTAO_IORTable -lTAO_AnyTypeCode -lTAO_CosEvent -lTAO_CosNaming -lTAO -lACE</p> </blockquote> <pre><code>TestSeqWrapper.o: In function `SeqWrapper': /u01/kasunt/workspace/corelibCORBA/include/corelibCORBA/SeqWrapper.hpp:165: undefined reference to `ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T()' </code></pre> <p>Doing nm of the library I can see the above constructor is included,</p> <pre><code>nm --demangle ../installed_components/lib/libCorbaIdl.so | grep "ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T" 000327ba t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(ECONZ::Corba::ComboElementSeq_T const&amp;) 000331c2 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int) 0002edb0 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int, unsigned int, ECONZ::Corba::ComboElement_T*, bool) 0002d768 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T() 00032e52 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(ECONZ::Corba::ComboElementSeq_T const&amp;) 0003172a t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int) 0002d8e0 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T(unsigned int, unsigned int, ECONZ::Corba::ComboElement_T*, bool) 0002d8a6 t ECONZ::Corba::ComboElementSeq_T::ComboElementSeq_T() </code></pre> <p>Offending line on the source code (line 165), <strong>SeqWrapper() : var_( new SequenceType ), size_( 0 ) { }</strong></p> <p>Part of the code,</p> <pre><code>template&lt; typename SEQUENCE &gt; class SeqWrapper : CppUtils::NonCopy { public: typedef SEQUENCE SequenceType; typedef typename SequenceType::_var_type SequenceType_var; typedef typename ElementTypeOf&lt;SequenceType_var&gt;::ElementType ElementType; typedef typename ElementTypeOf&lt;SequenceType_var&gt;::ReturnType ReturnType; typedef typename ElementTypeOf&lt;SequenceType_var&gt;::ConstReturnType ConstReturnType; private: SequenceType_var var_; CORBA::ULong size_; void expand_( CORBA::ULong size ) { // NOTE: current implementation assumes size only increases by small increments if (size &gt; var_-&gt;length()) { var_-&gt;length( (size &lt; 16)? 16 : (size &gt; 256? size+256 : 2*size-2) ); } } public: SeqWrapper() : var_( new SequenceType ), size_( 0 ) { } SeqWrapper( CORBA::ULong reserve ) : var_( new SequenceType( reserve ) ), size_( 0 ) { var_-&gt;length( reserve ); } SeqWrapper( SequenceType *ownSeq ) : var_( ownSeq ), size_( ownSeq-&gt;length() ) { } ..... </code></pre> <p>Source code of TestSeqWrapper.cpp (I have removed most of the unwanted stuff to make it less confusing)</p> <pre><code>#include &lt;iostream&gt; #include &lt;CppUtils/StringHelpers.hpp&gt; #include &lt;corelibCORBA/SeqWrapper.hpp&gt; #include &lt;CorbaC.h&gt; using namespace std; int main() { ECONZ::Corba::SeqWrapper&lt; ECONZ::Corba::StringSeq_T &gt; seq; } </code></pre> <p>And you can see that I have specified the shared library in the link options (shown in bold). I initially thought it might be due a dependency of some sort and moved the library flag to the beginning to no affect.</p> <p>I appreciate it.</p>
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    1. COcan you give the details of the line at SeqWrapper.hpp:165?
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    2. COYour path setup isn't proper. Check out your LIBPATH and INCLUDEPATH in your Makefile. Check out if the libraries installed path is proper and points out to the required directories.
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    3. COI have just pasted the line number and part of the code
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