FYI, I just deliver a MR ( https://gitlab.kitware.com/cmake/cmake/merge_requests/2624) which fix the problem of the selection of the library with the wrong architecture.
Le jeu. 15 nov. 2018 à 10:00, Eric Noulard <eric.noul...@gmail.com> a écrit : > Le jeu. 15 nov. 2018 à 09:47, Stéphane Ancelot <sance...@numalliance.com> > a écrit : > >> I agree. That was a debug snippet...but is wrong ... I setted up again >> the toolchain, but does not help. >> > > If you are using a proper toolchain for 32bit compilation. > It looks like a bug in the find_package for Python in the cross-compiling > case. > Do you have a stripped down example which exhibit the issue? > Which version of CMake are you using? > > >> So, I know where are include_dirs and libs for 32 bits cross compiling, >> I have to hardcode it like this ? >> >> add_library(python SHARED IMPORTED) >> set_target_properties( python PROPERTIES IMPORTED_LOCATION /usr/lib32/ >> libpython2.6.so ) >> target_include_directories(python SYSTEM ... >> > > I think you can do that but it replaces the use of find_package(Python2 > COMPONENTS Development) > may be fixing this would be a better long-term solution ? > > > >> >> >> Le 14/11/2018 à 17:53, Marc CHEVRIER a écrit : >> >> The way you proceed is wrong. >> The system configuration is determined during the 'project' function >> call. Setting information after this call is useless. So, in your example, >> on a 64bit system, the compilation configuration will be 64bit (variable >> CMAKE_SIZEOF_VOID_P has value 8). >> This explain why 'FIND_LIBRARY_USE_LIB32_PATHS' has no effect. This >> property is taken in consideration only on 32bit systems. >> >> Moreover, I am not sure that modifying variable 'CMAKE_SYSTEM_PROCESSOR' >> is a valid action. >> >> To configure a 32bit compilation environment, two possibilities: >> * using environment variables: env CFLAGS=-m32 CXXFLAGS=-m32 cmake ... >> * using a toolchain file: see >> https://cmake.org/cmake/help/v3.13/manual/cmake-toolchains.7.html >> >> >> Le mer. 14 nov. 2018 à 14:06, Stéphane Ancelot <sance...@numalliance.com> >> a écrit : >> >>> Hi, >>> >>> My system is 64 bits but I can cross compile python c modules for 32 >>> bits . >>> >>> Unfortunately I don't manage to retrieve python 32 libs , always the 64 >>> bits version is found. >>> >>> >>> here is what I tried : >>> >>> cmake_minimum_required(VERSION 3.10) >>> project(py_autom) >>> >>> >>> set(CMAKE_SYSTEM_PROCESSOR "i686") >>> >>> set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32" CACHE STRING "c++ flags") >>> set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32" CACHE STRING "c flags") >>> >>> set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB32_PATHS TRUE) >>> set_property(GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS FALSE) >>> >>> include_directories(python2.6) >>> find_package(Python2 COMPONENTS Development) >>> >>> >>> >>> message(STATUS "python ${PYTHON_INCLUDE_DIRS} ${Python2_LIBRARIES_DIR} >>> ${Python2_FOUND}") >>> >>> Regards >>> >>> Steph >>> -- >>> >>> 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 >>> >> -- >> >> 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 >> > > > -- > Eric >
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