On Wed, 2010-09-29 at 12:26 +0200, Ovanes Markarian wrote: > Hello *, > > > I have some library available as a Linux lib file. Now I need to > create a shared object (actually a MODULE in terms of CMake) out of > this lib. The module is later on loaded using the dlopen-API function. > > > I created a sample project with > > > / > +-- testlib > +-- so > > > > > testlib - consists of a single cpp file haveing a global variable and > a function returning it. > > > CMake script: > CMAKE_MINIMUM_REQUIRED(VERSION 2.6) > > > PROJECT(testlib CXX) > > > add_library(testlib STATIC functions.cpp) > > > > > so - consists of a cpp file and links against testlib. > > > CMake script: > CMAKE_MINIMUM_REQUIRED(VERSION 2.6) > > > PROJECT(so CXX) > > > add_library(so MODULE main.cpp) > target_link_libraries(so testlib) > set_target_properties (so PROPERTIES VERSION 1.0 LINKER_LANGUAGE CXX) > > > and the Root CMakeLists.txt which should build both: > > > CMAKE_MINIMUM_REQUIRED(VERSION 2.6) > > > PROJECT(dll_test CXX) > > > add_subdirectory(lib) > add_subdirectory(so) > add_dependencies(so lib) > > > > > Now my problem is that after the build I can find the symbols from > functions.cpp in the lib file using the nm tool. But these symbols are > not part of the so. How can I force them to be part of the so-Module? > > > > > Thanks in advance, > Ovanes > Hi Ovanes,
Short answer: you can't. This has been discussed several times on the mailing list. Longer answer: you can do it, but not in a portable way. Check the wiki: http://www.itk.org/Wiki/CMake_FAQ#Library_questions. There, you can also read that it is possible to do what you want if you want to use GNU GCC/LD-specific features like the link option --whole-archive. Needless to say that that's not portable. Besides, for this to work, you must have compiled your sources with -fPIC -DPIC which is not the default when building static libraries. HTH, Marcel Loose. _______________________________________________ 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
