Hi all. I'm using cmake with a cross-compiler environment, but building third party packages that are configured with CMake. So when I invoke cmake for those packages I add this options to the command line:
-DCMAKE_FIND_ROOT_PATH=/my/sysroot However, this is not working because it's finding 32bit libraries. For example if the package's CMakeLists.txt file contains this: find_package(ZLIB REQUIRED) then my link line ends up containing: /my/sysroot/usr/lib/libz.so which is the 32bit version and the link fails. The 64bit version DOES exist exactly as it should: $ ls -1 /my/sysroot/usr/lib*/libz.so* /my/sysroot/tools/usr/lib/libz.so /my/sysroot/tools/usr/lib64/libz.so and the link works if I do it by hand with the right path. I don't know why it's not automatically looking for lib64; I checked and CMake knows I want a 64bit build. For example I see this after running: CMakeFiles/3.11.3/CMakeCXXCompiler.cmake:set(CMAKE_CXX_SIZEOF_DATA_PTR "8") Actually I wish cmake would just add "-lz" to the command line and let the linker figure it all out rather than trying to second-guess things. Then it would "just work". In any event, if I edit the CMakeLists.txt in the package to set the global property FIND_LIBRARY_USE_LIB64_PATHS to ON, then it all works fine: set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS ON) But I can't see any way to set that property from the command line, without editing the package's CMakeLists.txt file which I obviously don't want to do. Help for either (a) figuring out why cmake incorrectly chooses 32bit libraries or (b) setting the property without editing third-party CMakeLists.txt files would be much appreciated!! -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake
