On Tuesday 15 Jun 2010 11:32:17 pm Andreas Pakulat wrote: > On 15.06.10 22:18:04, Kishore wrote: > > How do i inform cmake when building a module that it depends on another > > module? Does cmake need to even know that? > > > > I am building a plugin based qt application (my first time with plugins) > > and my situlation like with many other applications is that plugin A > > depends on plugin B. In my application i take care to load plugin B > > before A. However, loading plugin A fails complaining that it could not > > resolve links which are in B. plugin B which only depends on the > > application loads fine. > > > > Now, everything works fine if i declare that plugin A depends on B using > > the TARGET_LINK_LIBRARIES() function. But for this to work, i have to > > declare both A and B as SHARED instead of MODULE libraries. > > > > What is the right way to go? > > Thats not a real plugin system, plugins don't link against other plugins > directly. Your options are: > > - extract the code from B that you need in A into the shared lib (that > you should already have) that both A and B (and your application) link > against
This i could do... > - provide an interface header from B and a way in your app for a plugin > to get a pointer to such an interface. Then provide the necessary api > functions you need in A in that interface as pure virtual. That way A > can use this virtual interface to get at the B functions without > directly linking against it. This I don't fully understand. If A depends in B which would mean that it extends functionality in B, it would have to call some methods in B. No? In my implementation, I have a base class in B that has some pure virtual functions that are implemented by a class in A. On loading A it registers a factory object declaring availability of a certain functionality. The registration API resides in B. Apparently, I do not properly understand the concept of one plugin depending on another. -- Cheers! Kishore Ps: I initially thought this may have to do with cmake but it seems that this is more to do with general C++ and qt programming. If there is a more appropriate list for this please let me know. _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
