2020-10-12 08:55:18 +00:00
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# Create a CMake toolchain file for convenient configuration of both internal Qt builds
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# as well as CMake application projects.
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# Expects various global variables to be set.
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function(qt_internal_create_toolchain_file)
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if(QT_HOST_PATH)
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# TODO: Figure out how to make these relocatable.
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get_filename_component(__qt_host_path_absolute "${QT_HOST_PATH}" ABSOLUTE)
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set(init_qt_host_path "
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set(__qt_initial_qt_host_path \"${__qt_host_path_absolute}\")
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if(NOT DEFINED QT_HOST_PATH AND EXISTS \"\${__qt_initial_qt_host_path}\")
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set(QT_HOST_PATH \"\${__qt_initial_qt_host_path}\" CACHE PATH \"\" FORCE)
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endif()")
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get_filename_component(__qt_host_path_cmake_dir_absolute
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"${Qt${PROJECT_VERSION_MAJOR}HostInfo_DIR}/.." ABSOLUTE)
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set(init_qt_host_path_cmake_dir
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"
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set(__qt_initial_qt_host_path_cmake_dir \"${__qt_host_path_cmake_dir_absolute}\")
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if(NOT DEFINED QT_HOST_PATH_CMAKE_DIR AND EXISTS \"\${__qt_initial_qt_host_path_cmake_dir}\")
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set(QT_HOST_PATH_CMAKE_DIR \"\${__qt_initial_qt_host_path_cmake_dir}\" CACHE PATH \"\" FORCE)
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endif()")
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set(init_qt_host_path_checks "
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if(NOT QT_HOST_PATH OR NOT EXISTS \"\${QT_HOST_PATH}\")
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message(FATAL_ERROR \"To use a cross-compiled Qt, please specify a path to a host Qt installation by setting the QT_HOST_PATH cache variable.\")
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endif()
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if(NOT QT_HOST_PATH_CMAKE_DIR OR NOT EXISTS \"\${QT_HOST_PATH_CMAKE_DIR}\")
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message(FATAL_ERROR \"To use a cross-compiled Qt, please specify a path to a host Qt installation CMake directory by setting the QT_HOST_PATH_CMAKE_DIR cache variable.\")
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endif()")
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endif()
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if(CMAKE_TOOLCHAIN_FILE)
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file(TO_CMAKE_PATH "${CMAKE_TOOLCHAIN_FILE}" __qt_chainload_toolchain_file)
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set(init_original_toolchain_file
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"set(__qt_chainload_toolchain_file \"${__qt_chainload_toolchain_file}\")")
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endif()
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if(VCPKG_CHAINLOAD_TOOLCHAIN_FILE)
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list(APPEND init_vcpkg
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"set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE \"${VCPKG_CHAINLOAD_TOOLCHAIN_FILE}\")")
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endif()
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if(VCPKG_TARGET_TRIPLET)
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list(APPEND init_vcpkg
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"set(VCPKG_TARGET_TRIPLET \"${VCPKG_TARGET_TRIPLET}\" CACHE STRING \"\")")
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endif()
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# By default we don't want to allow mixing compilers for building different repositories, so we
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# embed the initially chosen compilers into the toolchain.
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# This is because on Windows compilers aren't easily mixed.
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# We want to avoid that qtbase is built using cl.exe for example, and then for another repo
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# gcc is picked up from %PATH%.
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# The same goes when using a custom compiler on other platforms, such as ICC.
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#
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# There are a few exceptions though.
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#
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# When crosscompiling using Boot2Qt, the environment setup shell script sets up the CXX env var,
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# which is used by CMake to determine the initial compiler that should be used.
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# Unfortunately, the CXX env var contains not only the compiler name, but also a few required
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# arch-specific compiler flags. This means that when building qtsvg, if the Qt created toolchain
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# file sets the CMAKE_CXX_COMPILER variable, the CXX env var is ignored and thus the extra
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# arch specific compiler flags are not picked up anymore, leading to a configuration failure.
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#
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# To avoid this issue, disable automatic embedding of the compilers into the qt toolchain when
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# cross compiling. This is merely a heuristic, becacuse we don't have enough data to decide
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# when to do it or not.
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# For example on Linux one might want to allow mixing of clang and gcc (maybe).
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#
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# To allow such use cases when the default is wrong, one can provide a flag to explicitly opt-in
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# or opt-out of the compiler embedding into the Qt toolchain.
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#
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# Passing -DQT_EMBED_TOOLCHAIN_COMPILER=ON will force embedding of the compilers.
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# Passing -DQT_EMBED_TOOLCHAIN_COMPILER=OFF will disable embedding of the compilers.
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set(__qt_embed_toolchain_compilers TRUE)
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if(CMAKE_CROSSCOMPILING)
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set(__qt_embed_toolchain_compilers FALSE)
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endif()
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if(DEFINED QT_EMBED_TOOLCHAIN_COMPILER)
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if(QT_EMBED_TOOLCHAIN_COMPILER)
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set(__qt_embed_toolchain_compilers TRUE)
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else()
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set(__qt_embed_toolchain_compilers FALSE)
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endif()
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endif()
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if(__qt_embed_toolchain_compilers)
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list(APPEND init_platform "
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set(__qt_initial_c_compiler \"${CMAKE_C_COMPILER}\")
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set(__qt_initial_cxx_compiler \"${CMAKE_CXX_COMPILER}\")
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if(NOT DEFINED CMAKE_C_COMPILER AND EXISTS \"\${__qt_initial_c_compiler}\")
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set(CMAKE_C_COMPILER \"\${__qt_initial_c_compiler}\" CACHE STRING \"\")
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endif()
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if(NOT DEFINED CMAKE_CXX_COMPILER AND EXISTS \"\${__qt_initial_cxx_compiler}\")
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set(CMAKE_CXX_COMPILER \"\${__qt_initial_cxx_compiler}\" CACHE STRING \"\")
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endif()")
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endif()
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if(APPLE)
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# For simulator_and_device build, we should not explicitly set the sysroot.
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list(LENGTH CMAKE_OSX_ARCHITECTURES _qt_osx_architectures_count)
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if(CMAKE_OSX_SYSROOT AND NOT _qt_osx_architectures_count GREATER 1 AND UIKIT)
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list(APPEND init_platform "
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set(__qt_initial_cmake_osx_sysroot \"${CMAKE_OSX_SYSROOT}\")
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if(NOT DEFINED CMAKE_OSX_SYSROOT AND EXISTS \"\${__qt_initial_cmake_osx_sysroot}\")
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set(CMAKE_OSX_SYSROOT \"\${__qt_initial_cmake_osx_sysroot}\" CACHE PATH \"\")
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endif()")
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endif()
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if(CMAKE_OSX_DEPLOYMENT_TARGET)
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list(APPEND init_platform
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"set(CMAKE_OSX_DEPLOYMENT_TARGET \"${CMAKE_OSX_DEPLOYMENT_TARGET}\" CACHE STRING \"\")")
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endif()
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if(UIKIT)
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list(APPEND init_platform
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"set(CMAKE_SYSTEM_NAME \"${CMAKE_SYSTEM_NAME}\" CACHE STRING \"\")")
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set(_qt_osx_architectures_escaped "${CMAKE_OSX_ARCHITECTURES}")
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string(REPLACE ";" "LITERAL_SEMICOLON"
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_qt_osx_architectures_escaped "${_qt_osx_architectures_escaped}")
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list(APPEND init_platform
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"set(CMAKE_OSX_ARCHITECTURES \"${_qt_osx_architectures_escaped}\" CACHE STRING \"\")")
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list(APPEND init_platform "if(CMAKE_GENERATOR STREQUAL \"Xcode\" AND NOT QT_NO_XCODE_EMIT_EPN)")
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list(APPEND init_platform " set_property(GLOBAL PROPERTY XCODE_EMIT_EFFECTIVE_PLATFORM_NAME OFF)")
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list(APPEND init_platform "endif()")
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endif()
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elseif(ANDROID)
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list(APPEND init_platform
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"set(ANDROID_NATIVE_API_LEVEL \"${ANDROID_NATIVE_API_LEVEL}\" CACHE STRING \"\")")
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list(APPEND init_platform "set(ANDROID_STL \"${ANDROID_STL}\" CACHE STRING \"\")")
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list(APPEND init_platform "set(ANDROID_ABI \"${ANDROID_ABI}\" CACHE STRING \"\")")
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list(APPEND init_platform "if (NOT DEFINED ANDROID_SDK_ROOT)")
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file(TO_CMAKE_PATH "${ANDROID_SDK_ROOT}" __qt_android_sdk_root)
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list(APPEND init_platform
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" set(ANDROID_SDK_ROOT \"${__qt_android_sdk_root}\" CACHE STRING \"\")")
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list(APPEND init_platform "endif()")
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2020-10-26 19:50:36 +00:00
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list(APPEND init_platform "if(NOT \"$\{ANDROID_NDK_ROOT\}\" STREQUAL \"\")")
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list(APPEND init_platform
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" set(__qt_toolchain_file_candidate \"$\{ANDROID_NDK_ROOT\}/build/cmake/android.toolchain.cmake\")")
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list(APPEND init_platform " if(EXISTS \"$\{__qt_toolchain_file_candidate\}\")")
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list(APPEND init_platform
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" message(STATUS \"Android toolchain file within NDK detected: $\{__qt_toolchain_file_candidate\}\")")
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list(APPEND init_platform " set(__qt_chainload_toolchain_file \"$\{__qt_toolchain_file_candidate\}\")")
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list(APPEND init_platform " else()")
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list(APPEND init_platform
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" message(FATAL_ERROR \"Cannot find the toolchain file '$\{__qt_toolchain_file_candidate\}'. \"")
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list(APPEND init_platform
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" \"Please specify the toolchain file with -DQT_CHAINLOAD_TOOLCHAIN_FILE=<file>.\")")
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list(APPEND init_platform " endif()")
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list(APPEND init_platform "endif()")
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2020-10-12 08:55:18 +00:00
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endif()
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string(REPLACE ";" "\n" init_vcpkg "${init_vcpkg}")
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string(REPLACE ";" "\n" init_platform "${init_platform}")
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string(REPLACE "LITERAL_SEMICOLON" ";" init_platform "${init_platform}")
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qt_compute_relative_path_from_cmake_config_dir_to_prefix()
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configure_file(
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"${CMAKE_CURRENT_SOURCE_DIR}/cmake/qt.toolchain.cmake.in"
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"${__GlobalConfig_build_dir}/qt.toolchain.cmake" @ONLY)
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qt_install(FILES "${__GlobalConfig_build_dir}/qt.toolchain.cmake"
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DESTINATION "${__GlobalConfig_install_dir}" COMPONENT Devel)
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endfunction()
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