Cross compilation issue from linux to windows #99
Description
I'm trying to cross-compile Boost to Windows using this project.
OS : Ubuntu 20
The cross compiler has been installed with :
sudo apt install mingw-w64
My cross compilation toolchain :
set(CMAKE_SYSTEM_NAME Windows)
set(TOOLCHAIN_PREFIX x86_64-w64-mingw32)
# cross compilers to use for C, C++ and Fortran
set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}-gcc)
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}-g++)
set(CMAKE_Fortran_COMPILER ${TOOLCHAIN_PREFIX}-gfortran)
set(CMAKE_RC_COMPILER ${TOOLCHAIN_PREFIX}-windres)
# target environment on the build host system
set(CMAKE_FIND_ROOT_PATH /usr/${TOOLCHAIN_PREFIX})
# modify default behavior of FIND_XXX() commands
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
The relevant part of my CMakeLists.txt :
# Find boost
add_subdirectory(libs/boost-cmake)
set(Boost_LIBRARIES
PUBLIC Boost::filesystem
PUBLIC Boost::system
PUBLIC Boost::coroutine
)
add_executable(myexec src/main.cpp ${myexec_srcs})
target_link_libraries(myexec ${myexec_libs} ${Boost_LIBRARIES})
Cmake seems to run properly :
-- Fetching Boost
-- Fetching Boost - done
-- Boost found: 1.71.0 /mnt/34B6EBFAB6EBBB0E/Workspace_CCpp/SBPL_cpp/build/_deps/boost-src
-- Could NOT find BZip2 (missing: BZIP2_LIBRARIES BZIP2_INCLUDE_DIR)
-- Could NOT find ZLIB (missing: ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
-- The following ICU libraries were not found:
-- uc (required)
-- dt (required)
-- i18n (required)
-- Failed to find all ICU components (missing: ICU_INCLUDE_DIR ICU_LIBRARY _ICU_REQUIRED_LIBS_FOUND)
-- Configuring done
-- Generating done
I don't have BZIP2 ICU or ZLIB since i'm using the cross compilation chain so that's ok.
But I get the following error :
[ 4%] Built target Boost_chrono
[ 8%] Built target Boost_thread
[ 8%] Building ASM object project/libs/boost-cmake/CMakeFiles/Boost_context.dir/__/__/__/_deps/boost-src/libs/context/src/asm/jump_x86_64_ms_pe_gas.asm.obj
x86_64-w64-mingw32-gcc: warning: /home/user/MyProject/build/_deps/boost-src/libs/context/src/asm/jump_x86_64_ms_pe_gas.asm: linker input file unused because linking not done
[ 13%] Building ASM object project/libs/boost-cmake/CMakeFiles/Boost_context.dir/__/__/__/_deps/boost-src/libs/context/src/asm/make_x86_64_ms_pe_gas.asm.obj
x86_64-w64-mingw32-gcc: warning: /home/user/MyProject/build/_deps/boost-src/libs/context/src/asm/make_x86_64_ms_pe_gas.asm: linker input file unused because linking not done
[ 13%] Building ASM object project/libs/boost-cmake/CMakeFiles/Boost_context.dir/__/__/__/_deps/boost-src/libs/context/src/asm/ontop_x86_64_ms_pe_gas.asm.obj
x86_64-w64-mingw32-gcc: warning: /home/user/MyProject/build/_deps/boost-src/libs/context/src/asm/ontop_x86_64_ms_pe_gas.asm: linker input file unused because linking not done
[ 13%] Linking CXX static library libboost_context.a
/usr/bin/x86_64-w64-mingw32-ar: CMakeFiles/Boost_context.dir/__/__/__/_deps/boost-src/libs/context/src/asm/jump_x86_64_ms_pe_gas.asm.obj: Aucun fichier ou dossier de ce type
make[2]: *** [project/libs/boost-cmake/CMakeFiles/Boost_context.dir/build.make:107 : sbpl_cpp/libs/boost-cmake/libboost_context.a] Erreur 1
make[1]: *** [CMakeFiles/Makefile2:672 : project/libs/boost-cmake/CMakeFiles/Boost_context.dir/all] Erreur 2
make: *** [Makefile:84 : all] Erreur 2
It seems it fails in the compilation of coroutine dependencies. It's as if there was somewhere a -c flag to prevent linking but I can't find it.
Any input on this issue is welcome.
To provide some context :
- I already tried to cross compile boost from linux with no success. So i decided to try this repository.