[Bug c++/15407] Problem using shared library created from template class

["uttamkumar at hotmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From uttamkumar at hotmail dot com  2004-05-12 19:43 -------
(In reply to comment #0)
> I have a template class declare in T.hpp and defined in T.cpp and want to 
build 
> a shared library and use that library to write an application. Only 
application 
> knows about the template(object) type.
> g++ -g -D_REENTRANT -frepo -O -W -Wall -Wno-unknown-pragmas -I. -I../h  -
fPIC -
> c  T.cpp
> It has created the T.rpo repository file.
> g++ -frepo -shared -o ../lib/libT.so -fPIC T.o
> Now build the app Th.
> g++ -g -D_REENTRANT -frepo -O -W -Wall -Wno-unknown-pragmas -I. -I../h  -
fPIC -
> c  Th.cpp
> It has created the Th.rpo file too.
> Now linking: and get the following errro.
> g++   Th.o -o Th -L../lib -lT -lpthread -lnsl -lsocket -lstdc++  -l c -l gcc_s
> Undefined                       first referenced
>  symbol                             in file
> ThreadQueue<Msg>::GetMsg(long)      Th.o
> ThreadQueue<Msg>::CreateThread(void* (*)(void*), void*)Th.o
> ThreadQueue<Msg>::PutMsg(Msg*)      Th.o
> ThreadQueue<Msg>::ThreadQueue[in-charge](int)Th.o
> ld: fatal: Symbol referencing errors. No output written to Th
> collect2: ld returned 1 exit status
> --------------------------------------------------
> If I use collect2 for linking I get the follwoing error.
> collect2   Th.o -o Th -L../lib -l T -lpthread -lnsl -lsocket -lstdc++  -lc -
> lgcc_s
> collect: recompiling Th.cpp
> collect: recompiling T.cpp
> T.cpp: In member function `T* ThreadQueue<T>::GetMsg(long int)':
> T.cpp:53: warning: `std::vector<T*, std::allocator<T*> >::iterator' 
>    is implicitly a typename
> T.cpp:53: warning: implicit typename is deprecated, please see the 
>    documentation for details
> collect: recompiling Th.cpp
> collect: recompiling ThreadQueue.cpp
> and it goes to infinite recompiling loop.



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15407