Re: Creating and sharing a c++ shared library ?

[vivekian]

On Feb 25, 1:49 pm, Markus Kossmann <mkossmann...@gmx.de> wrote:
> vivekian wrote:
> > Hi ,
>
> > These are the steps i followed to create a shared library
>
> > 1. Compiled the cpp files
>
> > g++ -c -g -fpic  -Wall -Wno-deprecated SockException.cpp -o
> > SockException.o
> > g++ -c -g -fpic -Wall -Wno-deprecated Socket.cpp -o Socket.o
> > g++ -c -g -fpic -Wall -Wno-deprecated TcpSocket.cpp -o TcpSocket.o
> > g++ -c -g -fpic -Wall -Wno-deprecated UdpSocket.cpp -o UdpSocket.o
> > g++ -c -g -fpic -Wall -Wno-deprecated SocketReaderWriter.cpp -o
> > SocketReaderWriter.o
> > g++ -shared -Wl,-soname,libcppsocket.so.1 -o libcppsocket.so.1.0.1
> > SockException.o Socket.o TcpSocket.o UdpSocket.o SocketReaderWriter.o -
> > lc
>
> > 2. Copied the compiled libcppsocket.so.1 to the directories /usr/lib
>
> > 3. Moved the header files to the directories /usr/include and /usr/
> > local/include
>
> > 4. To test the compiled library , i wrote a small program
>
> > #include <TcpSocket.h>
>
> > int main ()
> > {
> >         TcpSocket sock ;
> > }
>
> > where TcpSocket.h is one of the header files copied to /usr/include
>
> > 5. Compiling this test program
>
> > g++  main.cpp
> > /tmp/ccPqeVa9.o: In function `main':
> > main.cpp:(.text+0x8a): undefined reference to `TcpSocket::TcpSocket()'
> > main.cpp:(.text+0x95): undefined reference to
> > `TcpSocket::~TcpSocket()'
> > collect2: ld returned 1 exit status
>
> > gives the above error.
>
> > This i suppose indicates that the library has to be linked. But the
> > following doesnt help
> > g++ main.cpp -llibcppsocket
>
> > What am i missing here ?
>
> The linker looks only for .so and .a files ( without any version number)
> Create a link libcppsocket.so -> libcppsocket.so.1.0.1.

Thanks ...