On Friday 13 September 2013, SF Markus Elfring wrote:
...
> I have got still two open issues (on my side?).
>
> 1. The target name can be resolved inside the build system. But how should
> I determine generated file names when I want to refer to them from
> external sources like installation directories?
Sorry, I don't really understand your question. What generated file names, and
what external sources ?
> 2. I stumble on the following situation with the tools "CMake 2.8.11.2" and
> "GCC 4.7.2 20130108" on my openSUSE system.
>
> ...
> make -f examples++/CMakeFiles/client_cpp.dir/build.make
> examples++/CMakeFiles/client_cpp.dir/build
> make[2]: Entering directory `/home/elfring/Projekte/libsocket/Bau'
> Linking CXX executable client
> cd /home/elfring/Projekte/libsocket/Bau/examples++ && /usr/bin/cmake -E
> cmake_link_script CMakeFiles/client_cpp.dir/link.txt --verbose=1
> /usr/bin/c++ -O2 -g -DNDEBUG CMakeFiles/client_cpp.dir/client.cpp.o
> -o client -rdynamic ../libsocket_cpp.a ../libisocket.a ../libusocket.a
> ../libsocket_cpp.a(inetclientstream.cpp.o): In function
> `libsocket::inet_stream::connect(char const*, char const*, int, int)':
> /home/elfring/Projekte/libsocket/lokal/C++/inetclientstream.cpp:101:
> undefined reference to `create_inet_stream_socket(char const*, char
> const*, char, int)' collect2: error: ld returned 1 exit status
> make[2]: *** [examples++/client] Error 1
> make[2]: Leaving directory `/home/elfring/Projekte/libsocket/Bau'
> ...
>
> I find that strange because the library file which contains the "missed
> function" is usable for the C program examples as the software generation
> and a corresponding small test run acknowledges.
Probably one of two reasons:
You are using static libs, here the order of the libraries is significant. The
library containing the function create_inet_stream_socket() must be listed
after the file/library calling this function.
Or, since you are it seems mixing C and C++, you have a problem with symbol
naming. Do you have the
#ifdef __cplusplus
extern "C" {
#endif
in your C header files ?
Otherwise the C++ files see your C functions as C++ functions and expect C++
name mangled symbols.
Alex
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