Bare bones working example and documentation
Martin Felis
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.*.swp
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build*
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cmake_minimum_required(VERSION 3.16)
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project(QtClangTest)
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set(CMAKE_CXX_STANDARD 14)
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set(CMAKE_AUTOMOC ON)
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set(CMAKE_AUTORCC ON)
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set(CMAKE_AUTOUIC ON)
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set(QT_VERSION 5)
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set(REQUIRED_LIBS Core Gui Widgets)
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set(REQUIRED_LIBS_QUALIFIED Qt5::Core Qt5::Gui Qt5::Widgets)
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add_executable(${PROJECT_NAME} main.cpp)
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find_package(Qt${QT_VERSION} COMPONENTS ${REQUIRED_LIBS} REQUIRED)
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target_link_libraries(${PROJECT_NAME} ${REQUIRED_LIBS_QUALIFIED})
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if (WIN32)
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set(DEBUG_SUFFIX)
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if (CMAKE_BUILD_TYPE MATCHES "Debug")
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set(DEBUG_SUFFIX "d")
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endif ()
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if (EXISTS "${QT_INSTALL_PATH}/plugins/platforms/qwindows${DEBUG_SUFFIX}.dll")
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add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E make_directory
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"$<TARGET_FILE_DIR:${PROJECT_NAME}>/plugins/platforms/")
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add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy
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"${QT_INSTALL_PATH}/plugins/platforms/qwindows${DEBUG_SUFFIX}.dll"
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"$<TARGET_FILE_DIR:${PROJECT_NAME}>/plugins/platforms/")
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endif ()
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foreach (QT_LIB ${REQUIRED_LIBS})
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add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
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COMMAND ${CMAKE_COMMAND} -E copy
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"${QT_INSTALL_PATH}/bin/Qt${QT_VERSION}${QT_LIB}${DEBUG_SUFFIX}.dll"
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"$<TARGET_FILE_DIR:${PROJECT_NAME}>")
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endforeach (QT_LIB)
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endif ()
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57
README.md
57
README.md
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# cross_cmake_clang_qt
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# Cross Compiling a Qt5 App using Clang and CMake
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Example that uses CMake, Clang, and Qt to cross compile a simple application for Windows with MSVC compatibility.
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Example that uses CMake, Clang, and Qt to cross compile a simple application for Windows with MSVC compatibility.
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Parts of it based on: https://gist.github.com/HiImJulien/3eb47d7d874fe5483810bd77940e74c0
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## Requirements
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- Clang Version 10
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- Visual Studio Build Tools: https://visualstudio.microsoft.com/downloads/
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- Qt5: https://download.qt.io/official_releases/qt
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## Instructions Linux
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### Requirements:
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- Qt5 development packages
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- Clang 10
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### Steps
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- Copy MSVC build tools into the project directory:
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- Copy `C:/Program Files (x86)/Microsoft Visual Studio/2019/BuildTools/VC/Tools/MSVC/<MSVC Version>` to `msvc_build_tools/MSVC`
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- Copy Windows SDK into the project directory:
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- From `C:/Program Files (x86)/Windows Kits/10` copy the folders
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* `Include` to `msvc_build_tools/Kit`
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* `Lib` to `msvc_build_tools/Kit`
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- Both directories have sub directories with the Windows SDK Version as
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name.
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- Adjust `clang_windows_toolchain.cmake` to use the proper Windows SDK
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Version in variable `WINSDK_VER`
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- Copy the Qt5 msvc development files into the project directory:
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- Copy `C:/Qt/Qt5.12.10/5.12.10/msvc2017_64` to `qt5_msvc2017_64`
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- Configure project using:
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`cmake -DCMAKE_TOOLCHAIN_FILE=clang_windows_toolchain.cmake <project dir>`
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## Instructions Windows with JetBrains CLion
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### Requirements:
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- Download and Install Qt5 (MinGW libraries not needed)
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- Clang 10 (https://releases.llvm.org/download.html)
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- Install MinGW Make
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- Install JetBrains CLion (https://jetbrains.com/clion)
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### Steps
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- Open project
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- Adjust Toolchain
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- Go to Toolchain Settings
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- Remove existing Toolchains
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- Add MinGW Toolchain
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- Adjust CMake Profiles
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- Add `-DCMAKE_TOOLCHAIN_FILE=clang_windows_toolchain.cmake` as CMake
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parameters
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# Cross toolchain configuration for using clang-cl.
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set(WINSDK_VER "10.0.19041.0")
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set(QT5_VERSION "5.12.20")
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if(WIN32)
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set(CMAKE_C_COMPILER "C:/llvm/bin/clang-cl.exe")
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set(CMAKE_CXX_COMPILER "C:/llvm/bin/clang-cl.exe")
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set(CMAKE_LINKER "C:/llvm/bin/lld-link.exe")
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set(CMAKE_PREFIX_PATH "C:/Qt/Qt${QT5_VERSION}/${QT5_VERSION}/msvc2017_64/lib/cmake/Qt5")
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set(QT_INSTALL_PATH "C:/Qt/Qt${QT5_VERSION}/${QT5_VERSION}/msvc2017_64")
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set(MSVC_BASE "C:/MSVCBuildTools/MSVC")
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set(WINSDK_BASE "C:/MSVCBuildTools/Kit")
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else()
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set(CMAKE_C_COMPILER "/usr/bin/clang-cl-10")
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set(CMAKE_CXX_COMPILER "/usr/bin/clang-cl-10")
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set(CMAKE_LINKER "/usr/bin/lld-link-10")
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set(Qt5_DIR "${PROJECT_SOURCE_DIR}/qt5_msvc2017_64/lib/cmake/Qt5")
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set(QT_INSTALL_PATH "${PROJECT_SOURCE_DIR}/qt5_msvc2017_64")
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set(MSVC_BASE "${PROJECT_SOURCE_DIR}/msvc_build_tools/MSVC")
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set(WINSDK_BASE "${PROJECT_SOURCE_DIR}/msvc_build_tools/Kit")
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endif()
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set(CMAKE_SYSTEM_NAME Windows)
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set(CMAKE_SYSTEM_VERSION 10.0)
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set(CMAKE_SYSTEM_PROCESSOR AMD64)
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set(MSVC_INCLUDE "${MSVC_BASE}/include")
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set(MSVC_LIB "${MSVC_BASE}/lib")
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set(WINSDK_INCLUDE "${WINSDK_BASE}/Include/${WINSDK_VER}")
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set(WINSDK_LIB "${WINSDK_BASE}/Lib/${WINSDK_VER}")
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set(COMPILE_FLAGS
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-D_CRT_SECURE_NO_WARNINGS
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-imsvc "'${MSVC_INCLUDE}'"
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-imsvc "'${WINSDK_INCLUDE}/ucrt'"
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-imsvc "'${WINSDK_INCLUDE}/shared'"
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-imsvc "'${WINSDK_INCLUDE}/um'"
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-imsvc "'${WINSDK_INCLUDE}/winrt'"
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)
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string(REPLACE ";" " " COMPILE_FLAGS "${COMPILE_FLAGS}")
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set(_CMAKE_C_FLAGS_INITIAL "${CMAKE_C_FLAGS}" CACHE STRING "")
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set(CMAKE_C_FLAGS "${_CMAKE_C_FLAGS_INITIAL} ${COMPILE_FLAGS}" CACHE STRING "" FORCE)
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set(_CMAKE_CXX_FLAGS_INITIAL "${CMAKE_C_FLAGS}" CACHE STRING "")
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set(CMAKE_CXX_FLAGS "${_CMAKE_CXX_FLAGS_INITIAL} ${COMPILE_FLAGS}" CACHE STRING "" FORCE)
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set(LINK_FLAGS
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/manifest:no
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-libpath:"${MSVC_LIB}/x64"
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-libpath:"${WINSDK_LIB}/ucrt/x64"
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-libpath:"${WINSDK_LIB}/um/x64"
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)
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string(REPLACE ";" " " LINK_FLAGS "${LINK_FLAGS}")
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set(_CMAKE_EXE_LINKER_FLAGS_INITIAL "${CMAKE_EXE_LINKER_FLAGS}" CACHE STRING "")
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set(CMAKE_EXE_LINKER_FLAGS "${_CMAKE_EXE_LINKER_FLAGS_INITIAL} ${LINK_FLAGS}" CACHE STRING "" FORCE)
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set(_CMAKE_MODULE_LINKER_FLAGS_INITIAL "${CMAKE_MODULE_LINKER_FLAGS}" CACHE STRING "")
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set(CMAKE_MODULE_LINKER_FLAGS "${_CMAKE_MODULE_LINKER_FLAGS_INITIAL} ${LINK_FLAGS}" CACHE STRING "" FORCE)
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set(_CMAKE_SHARED_LINKER_FLAGS_INITIAL "${CMAKE_SHARED_LINKER_FLAGS}" CACHE STRING "")
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set(CMAKE_SHARED_LINKER_FLAGS "${_CMAKE_SHARED_LINKER_FLAGS_INITIAL} ${LINK_FLAGS}" CACHE STRING "" FORCE)
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set(CMAKE_C_STANDARD_LIBRARIES "" CACHE STRING "" FORCE)
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set(CMAKE_CXX_STANDARD_LIBRARIES "" CACHE STRING "" FORCE)
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set(CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_NO_WARNINGS ON)
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