On Thursday, July 30, 2015 10:56:02 AM Brad King wrote: > On 07/30/2015 09:29 AM, Pascal Bach wrote: > > CMAKE_FIND_ROOT_PATH_MODE would then need to be extended to support > > something like NATIVE and TARGET that one could use to choose where > > to look for files. > > This way every find_* call could explicitly tell if it wants a host > > or a target version. > > Are you proposing new keyword arguments to find_* commands to specify > this? The problem is that find modules don't necessarily know which > kind of binary the application wants. That is why we have the > CMAKE_FIND_ROOT_PATH_MODE_<type> variables. > > The existing CMAKE_FIND_ROOT_PATH* and CMAKE_SYSROOT options have been > sufficient for most packages for a long time. We regularly get > complaints that FindPythonLibs does not ask the python executable > where to get its libraries, and our answer every time is that it is > wrong to do that for cross compiling. FindQt4 is making that mistake, > and that is the cause of these troubles. > > FindQt4 should be taught not to ask qmake for anything when cross > compiling.
FindQt4 supports 2 use cases when cross compiling. 1. One Qt installation with a mix of native and non-native files. 2. Two Qt installations, one native and one non-native. In this case, qmake may still be queried to find other tools, but CMAKE_FIND_ROOT_PATH is used to find the non-native includes and libraries. The second case is what you are asking for, right? This why I previously suggested changing from SET(CMAKE_FIND_ROOT_PATH /sysroot/arm ...) to SET(CMAKE_FIND_ROOT_PATH /sysroot/arm/usr ...) Because its a find root, not a sysroot. Clint -- 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: http://public.kitware.com/mailman/listinfo/cmake-developers
