I'm compiling in cygwin with gcc 4.8.2, and the compilation finishes without an error. But when linked, I receive the following message:
bin/libUsersMgmnt.a(CUsersMgmnt.cpp.o): In function
nsUserMgmnt::CUsersMgmnt::CUsersMgmnt()': /home/HCAST2/v1.05-dev/UsersMgmnt/CUsersMgmnt.cpp:23: undefined reference to
int nsMsgHandler::CMsgHandler::createLocationUserMap()' /home/HCAST2/v1.05-dev/UsersMgmnt/CUsersMgmnt.cpp:23:(.text+0x19f): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `int nsMsgHandler::CMsgHandler::createLocationUserMap()' collect2: error: ld returned 1 exit status
I have this Base Class:
Header File CMsgHandler.h
namespace nsMsgHandler
{
class CMsgHandler
{
protected:
template<class enhFlags> createLocationUserMap();
};
}
Code File CMsgHandler.cpp
... some code
using namespace nsMsgHandler;
... some code
template <class enhFlags>
int CMsgHandler::createLocationUserMap()
{
.....
}
This is the derived class: Header File CUsersMgmnt.h
namespace nsUserMgmnt
{
class CUsersMgmnt : public CMsgHandler
{
public:
CUsersMgmnt();
};
}
Code file CUsersMgmnt.cpp
... some code
using namespace nsUserMgmnt;
... some code
CUsersMgmnt::CUsersMgmnt()
{
this->createLocationUserMap<nsUserMgmnt::types::Class1>();
}
I'm pretty sure that there is an error in the code. I tried to resolve this problem for hours.
You should move your:
template <class enhFlags>
int CMsgHandler::createLocationUserMap()
{
.....
}
to CMsgHandler.h
otherwise compiler is not able to instantiate your template in CUsersMgmnt.cpp