CMake: Support cross-compilation with qmake
When cross-compiling, we now create a target_qt.conf file that's to be used with the host Qt's qmake. With "qmake -qtconf .../target_qt.conf" projects can be cross-built against the cross-built Qt. We also create wrapper scripts for the host qmake to save the user from passing the -qtconf argument. Fixes: QTBUG-82581 Change-Id: Ib5866e7e820369efea9eb3171e3e3e3ca5c0c3c1 Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
This commit is contained in:
Joerg Bornemann
parent
b0f9c06a9b
commit
d7fd684861
2
bin/qmake-wrapper-for-target.bat.in
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2
bin/qmake-wrapper-for-target.bat.in
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@ -0,0 +1,2 @@
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@echo off
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@host_qt_bindir@\qmake.exe %* -qtconf "%~dp0\target_qt.conf"
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7
bin/qmake-wrapper-for-target.in
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7
bin/qmake-wrapper-for-target.in
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@ -0,0 +1,7 @@
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#!/bin/sh
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# The directory of this script is the expanded absolute path of the "$qt_prefix/bin" directory.
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script_dir_path=`dirname $0`
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script_dir_path=`(cd "$script_dir_path"; /bin/pwd)`
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@host_qt_bindir@/qmake $* -qtconf "$script_dir_path/target_qt.conf"
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@ -293,6 +293,7 @@ qt_feature_module_end(GlobalConfig OUT_VAR_PREFIX "__GlobalConfig_")
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qt_generate_global_config_pri_file()
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qt_generate_global_module_pri_file()
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qt_generate_qmake_wrapper_for_target()
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add_library(Qt::GlobalConfig ALIAS GlobalConfig)
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@ -295,8 +295,11 @@ elseif(EMSCRIPTEN)
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set(QT_QMAKE_TARGET_MKSPEC wasm-emscripten)
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endif()
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# TODO: Fixme to be correct.
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set(QT_QMAKE_HOST_MKSPEC "${QT_QMAKE_TARGET_MKSPEC}")
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if(CMAKE_CROSSCOMPILING)
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set(QT_QMAKE_HOST_MKSPEC "${QT${PROJECT_VERSION_MAJOR}_HOST_INFO_QMAKE_MKSPEC}")
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else()
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set(QT_QMAKE_HOST_MKSPEC "${QT_QMAKE_TARGET_MKSPEC}")
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endif()
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# Platform definition dir provided by user on command line.
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# Derive the absolute one relative to the current source dir.
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@ -1303,6 +1306,90 @@ CONFIG += ${private_config_joined}
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qt_install(FILES "${qmodule_pri_target_path}" DESTINATION ${INSTALL_MKSPECSDIR})
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endfunction()
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# In the cross-compiling case, creates a wrapper around the host Qt's
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# qmake executable. Also creates a qmake configuration file that sets
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# up the host qmake's properties for cross-compiling with this Qt
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# build.
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function(qt_generate_qmake_wrapper_for_target)
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if(NOT CMAKE_CROSSCOMPILING)
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return()
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endif()
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# Call the configuration file something else but qt.conf to avoid
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# being picked up by the qmake executable that's created if
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# QT_BUILD_TOOLS_WHEN_CROSSCOMPILING is enabled.
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qt_path_join(qt_conf_path "${INSTALL_BINDIR}" "target_qt.conf")
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set(prefix "${CMAKE_INSTALL_PREFIX}")
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set(ext_prefix "${CMAKE_STAGING_PREFIX}")
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if(ext_prefix STREQUAL "")
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set(ext_prefix "${prefix}")
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endif()
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set(host_prefix "${QT_HOST_PATH}")
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file(RELATIVE_PATH host_prefix_relative_to_conf_file "${ext_prefix}/${INSTALL_BINDIR}"
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"${host_prefix}")
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file(RELATIVE_PATH ext_prefix_relative_to_conf_file "${ext_prefix}/${INSTALL_BINDIR}"
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"${ext_prefix}")
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file(RELATIVE_PATH ext_prefix_relative_to_host_prefix "${host_prefix}" "${ext_prefix}")
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set(content "")
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if(ext_prefix STREQUAL prefix)
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set(sysrootify_prefix true)
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else()
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set(sysrootify_prefix false)
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string(APPEND content "[DevicePaths]
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Prefix=${prefix}
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")
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endif()
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if(NOT QT_WILL_INSTALL)
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# The shadow build directory of a non-prefix build does not contain a copy of the mkspecs
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# directory. Let $$[QT_HOST_DATA/src] point to the qtbase source directory.
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string(APPEND content "[EffectiveSourcePaths]
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HostData=${CMAKE_CURRENT_SOURCE_DIR}
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")
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# Set $$[QT_HOST_DATA/get] to avoid falling back to the source dir where it isn't explicitly
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# requested.
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string(APPEND content "[EffectivePaths]
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HostData=${ext_prefix}
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")
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endif()
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string(APPEND content
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"[Paths]
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Prefix=${ext_prefix_relative_to_conf_file}
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HostPrefix=${host_prefix_relative_to_conf_file}
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HostData=${ext_prefix_relative_to_host_prefix}
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Sysroot=${CMAKE_SYSROOT}
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SysrootifyPrefix=${sysrootify_prefix}
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TargetSpec=${QT_QMAKE_TARGET_MKSPEC}
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HostSpec=${QT_QMAKE_HOST_MKSPEC}
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")
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file(GENERATE OUTPUT "${qt_conf_path}" CONTENT "${content}")
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qt_path_join(qmake_wrapper_in_file "${CMAKE_CURRENT_SOURCE_DIR}/bin/qmake-wrapper-for-target")
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qt_path_join(qmake_wrapper "preliminary" "qmake")
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if(QT_BUILD_TOOLS_WHEN_CROSSCOMPILING)
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# Avoid collisions with the cross-compiled qmake binary.
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string(PREPEND qmake_wrapper "host-")
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endif()
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if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
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string(APPEND qmake_wrapper_in_file ".bat")
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string(APPEND qmake_wrapper ".bat")
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endif()
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string(APPEND qmake_wrapper_in_file ".in")
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set(host_qt_bindir "${host_prefix}/${QT${PROJECT_VERSION_MAJOR}_HOST_INFO_BINDIR}")
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configure_file("${qmake_wrapper_in_file}" "${qmake_wrapper}" @ONLY)
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qt_install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${qt_conf_path}"
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DESTINATION "${INSTALL_BINDIR}")
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qt_copy_or_install(PROGRAMS "${CMAKE_CURRENT_BINARY_DIR}/${qmake_wrapper}"
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DESTINATION "${INSTALL_BINDIR}")
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endfunction()
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# Takes a list of path components and joins them into one path separated by forward slashes "/",
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# and saves the path in out_var.
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function(qt_path_join out_var)
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@ -152,6 +152,20 @@ option(QT_NO_MAKE_EXAMPLES "Should examples be built as part of the default 'all
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# Build Benchmarks
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option(QT_BUILD_BENCHMARKS "Build Qt Benchmarks" ${__build_benchmarks})
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## Find host tools (if non native):
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set(QT_HOST_PATH "" CACHE PATH "Installed Qt host directory path, used for cross compiling.")
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if (CMAKE_CROSSCOMPILING)
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if(NOT IS_DIRECTORY ${QT_HOST_PATH})
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message(FATAL_ERROR "You need to set QT_HOST_PATH to cross compile Qt.")
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endif()
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list(PREPEND CMAKE_PREFIX_PATH "${QT_HOST_PATH}")
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list(PREPEND CMAKE_FIND_ROOT_PATH "${QT_HOST_PATH}")
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find_package(Qt${PROJECT_VERSION_MAJOR}HostInfo REQUIRED)
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list(POP_FRONT CMAKE_PREFIX_PATH)
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list(POP_FRONT CMAKE_FIND_ROOT_PATH)
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endif()
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## Android platform settings
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if(ANDROID)
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include(QtPlatformAndroid)
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@ -175,13 +189,6 @@ qt_set_up_nonprefix_build()
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qt_set_language_standards()
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## Find host tools (if non native):
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set(QT_HOST_PATH "" CACHE PATH "Installed Qt host directory path, used for cross compiling.")
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if (CMAKE_CROSSCOMPILING AND NOT IS_DIRECTORY ${QT_HOST_PATH})
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message(FATAL_ERROR "You need to set QT_HOST_PATH to cross compile Qt.")
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endif()
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## Enable support for sanitizers:
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qt_internal_set_up_sanitizer_features()
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include(${CMAKE_CURRENT_LIST_DIR}/3rdparty/extra-cmake-modules/modules/ECMEnableSanitizers.cmake)
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