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qt5base-lts/cmake/QtAutoDetect.cmake
Alexandru Croitor 5b90b650a4 CMake: Implement missing iOS-related configure options 
Detect an iOS build when either an -sdk option is passed
or when -xplatform macx-ios-clang is passed as a target
mkspec.

Now that CMake 3.17 is released, change the default behavior of the
iOS build to configure with simulator_and_device set to ON, like it
is with qmake.

Update the documentation regarding iOS configuration.

Change-Id: I91aaf706610b8d3c69f1ad4ba9dadee2b1e5db97
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
2020-10-12 13:35:57 +02:00

283 lines
12 KiB
CMake
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#
# Collection of auto detection routines to improve the user experience when
# building Qt from source.
#
# Make sure to not run detection when building standalone tests, because the detection was already
# done when initially configuring qtbase.
function(qt_auto_detect_android)
if(DEFINED CMAKE_TOOLCHAIN_FILE AND NOT DEFINED QT_AUTODETECT_ANDROID)
file(READ ${CMAKE_TOOLCHAIN_FILE} toolchain_file_content OFFSET 0 LIMIT 80)
string(FIND ${toolchain_file_content} "The Android Open Source Project" find_result REVERSE)
if (NOT ${find_result} EQUAL -1)
set(android_detected TRUE)
else()
set(android_detected FALSE)
endif()
if(android_detected)
message(STATUS "Android toolchain file detected, checking configuration defaults...")
if(NOT DEFINED ANDROID_NATIVE_API_LEVEL)
message(STATUS "ANDROID_NATIVE_API_LEVEL was not specified, using API level 23 as default")
set(ANDROID_NATIVE_API_LEVEL 23 CACHE STRING "")
endif()
if(NOT DEFINED ANDROID_STL)
set(ANDROID_STL "c++_shared" CACHE STRING "")
endif()
endif()
set(QT_AUTODETECT_ANDROID ${android_detected} CACHE STRING "")
elseif (QT_AUTODETECT_ANDROID)
message(STATUS "Android toolchain file detected")
endif()
endfunction()
function(qt_auto_detect_vpckg)
if(DEFINED ENV{VCPKG_ROOT})
set(vcpkg_toolchain_file "$ENV{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake")
get_filename_component(vcpkg_toolchain_file "${vcpkg_toolchain_file}" ABSOLUTE)
if(DEFINED CMAKE_TOOLCHAIN_FILE)
get_filename_component(supplied_toolchain_file "${CMAKE_TOOLCHAIN_FILE}" ABSOLUTE)
if(NOT supplied_toolchain_file STREQUAL vcpkg_toolchain_file)
set(VCPKG_CHAINLOAD_TOOLCHAIN_FILE "${CMAKE_TOOLCHAIN_FILE}" CACHE STRING "")
endif()
unset(supplied_toolchain_file)
endif()
set(CMAKE_TOOLCHAIN_FILE "${vcpkg_toolchain_file}" CACHE STRING "" FORCE)
message(STATUS "Using vcpkg from $ENV{VCPKG_ROOT}")
if(DEFINED ENV{VCPKG_DEFAULT_TRIPLET} AND NOT DEFINED VCPKG_TARGET_TRIPLET)
set(VCPKG_TARGET_TRIPLET "$ENV{VCPKG_DEFAULT_TRIPLET}" CACHE STRING "")
message(STATUS "Using vcpkg triplet ${VCPKG_TARGET_TRIPLET}")
endif()
unset(vcpkg_toolchain_file)
message(STATUS "CMAKE_TOOLCHAIN_FILE is: ${CMAKE_TOOLCHAIN_FILE}")
if(DEFINED VCPKG_CHAINLOAD_TOOLCHAIN_FILE)
message(STATUS "VCPKG_CHAINLOAD_TOOLCHAIN_FILE is: ${VCPKG_CHAINLOAD_TOOLCHAIN_FILE}")
endif()
endif()
endfunction()
function(qt_auto_detect_ios)
if(CMAKE_SYSTEM_NAME STREQUAL iOS
OR CMAKE_SYSTEM_NAME STREQUAL watchOS
OR CMAKE_SYSTEM_NAME STREQUAL tvOS)
message(STATUS "Using internal CMake ${CMAKE_SYSTEM_NAME} toolchain file.")
# The QT_UIKIT_SDK check simulates the input.sdk condition for simulator_and_device in
# configure.json.
# If the variable is explicitly provided, assume simulator_and_device to be off.
if(QT_UIKIT_SDK)
set(simulator_and_device OFF)
else()
# Default to simulator_and_device when an explicit sdk is not requested.
# Requires CMake 3.17.0+.
set(simulator_and_device ON)
endif()
message(STATUS "simulator_and_device set to: \"${simulator_and_device}\".")
# Choose relevant architectures.
# Using a non xcode generator requires explicit setting of the
# architectures, otherwise compilation fails with unknown defines.
if(CMAKE_SYSTEM_NAME STREQUAL iOS)
if(simulator_and_device)
set(osx_architectures "arm64;x86_64")
elseif(QT_UIKIT_SDK STREQUAL "iphoneos")
set(osx_architectures "arm64")
elseif(QT_UIKIT_SDK STREQUAL "iphonesimulator")
set(osx_architectures "x86_64")
else()
if(NOT DEFINED QT_UIKIT_SDK)
message(FATAL_ERROR "Please proviude a value for -DQT_UIKIT_SDK."
" Possible values: iphoneos, iphonesimulator.")
else()
message(FATAL_ERROR
"Unknown SDK argument given to QT_UIKIT_SDK: ${QT_UIKIT_SDK}.")
endif()
endif()
elseif(CMAKE_SYSTEM_NAME STREQUAL tvOS)
if(simulator_and_device)
set(osx_architectures "arm64;x86_64")
elseif(QT_UIKIT_SDK STREQUAL "appletvos")
set(osx_architectures "arm64")
elseif(QT_UIKIT_SDK STREQUAL "appletvsimulator")
set(osx_architectures "x86_64")
else()
if(NOT DEFINED QT_UIKIT_SDK)
message(FATAL_ERROR "Please proviude a value for -DQT_UIKIT_SDK."
" Possible values: appletvos, appletvsimulator.")
else()
message(FATAL_ERROR
"Unknown SDK argument given to QT_UIKIT_SDK: ${QT_UIKIT_SDK}.")
endif()
endif()
elseif(CMAKE_SYSTEM_NAME STREQUAL watchOS)
if(simulator_and_device)
set(osx_architectures "armv7k;i386")
elseif(QT_UIKIT_SDK STREQUAL "watchos")
set(osx_architectures "armv7k")
elseif(QT_UIKIT_SDK STREQUAL "watchsimulator")
set(osx_architectures "i386")
else()
if(NOT DEFINED QT_UIKIT_SDK)
message(FATAL_ERROR "Please proviude a value for -DQT_UIKIT_SDK."
" Possible values: watchos, watchsimulator.")
else()
message(FATAL_ERROR
"Unknown SDK argument given to QT_UIKIT_SDK: ${QT_UIKIT_SDK}.")
endif()
endif()
endif()
# For non simulator_and_device builds, we need to explicitly set the SYSROOT aka the sdk
# value.
if(QT_UIKIT_SDK)
set(CMAKE_OSX_SYSROOT "${QT_UIKIT_SDK}" CACHE STRING "")
endif()
set(CMAKE_OSX_ARCHITECTURES "${osx_architectures}" CACHE STRING "")
if(NOT DEFINED BUILD_SHARED_LIBS)
set(BUILD_SHARED_LIBS OFF CACHE BOOL "Build Qt statically or dynamically" FORCE)
endif()
if(BUILD_SHARED_LIBS)
message(FATAL_ERROR
"Building Qt for ${CMAKE_SYSTEM_NAME} as shared libraries is not supported.")
endif()
# Disable qt rpaths for iOS, just like mkspecs/common/uikit.conf does, due to those
# bundles not being able to use paths outside the app bundle. Not sure this is strictly
# needed though.
set(QT_DISABLE_RPATH "OFF" CACHE BOOL "Disable automatic Qt rpath handling." FORCE)
endif()
endfunction()
function(qt_auto_detect_cmake_config)
if(CMAKE_CONFIGURATION_TYPES)
# Allow users to specify this option.
if(NOT QT_MULTI_CONFIG_FIRST_CONFIG)
list(GET CMAKE_CONFIGURATION_TYPES 0 first_config_type)
set(QT_MULTI_CONFIG_FIRST_CONFIG "${first_config_type}")
set(QT_MULTI_CONFIG_FIRST_CONFIG "${first_config_type}" PARENT_SCOPE)
endif()
set(CMAKE_TRY_COMPILE_CONFIGURATION "${QT_MULTI_CONFIG_FIRST_CONFIG}" PARENT_SCOPE)
if(CMAKE_GENERATOR STREQUAL "Ninja Multi-Config")
# Create build-<config>.ninja files for all specified configurations.
set(CMAKE_CROSS_CONFIGS "all" CACHE STRING "")
# The configuration that will be considered the main one (for example when
# configuring standalone tests with a single-config generator like Ninja).
set(CMAKE_DEFAULT_BUILD_TYPE "${QT_MULTI_CONFIG_FIRST_CONFIG}" CACHE STRING "")
# By default when ninja is called without parameters, it will build all configurations.
set(CMAKE_DEFAULT_CONFIGS "all" CACHE STRING "")
endif()
endif()
endfunction()
function(qt_auto_detect_cyclic_toolchain)
if(CMAKE_TOOLCHAIN_FILE AND CMAKE_TOOLCHAIN_FILE MATCHES "/qt.toolchain.cmake$")
message(FATAL_ERROR
"Woah there! You can't use the Qt generated qt.toolchain.cmake file to configure "
"qtbase, because that will create a toolchain file that includes itself!\n"
"Did you accidentally use qt-cmake to configure qtbase? Make sure to remove the "
"CMakeCache.txt file, and configure qtbase with 'cmake' instead of 'qt-cmake'.")
endif()
endfunction()
function(qt_internal_get_darwin_sdk_version out_var)
if(APPLE)
if(IOS)
set(sdk_name "iphoneos")
elseif(TVOS)
set(sdk_name "appletvos")
elseif(WATCHOS)
set(sdk_name "watchos")
else()
# Default to macOS
set(sdk_name "macosx")
endif()
set(xcrun_version_arg "--show-sdk-version")
execute_process(COMMAND /usr/bin/xcrun --sdk ${sdk_name} ${xcrun_version_arg}
OUTPUT_VARIABLE sdk_version
ERROR_VARIABLE xcrun_error)
if(NOT sdk_version)
message(FATAL_ERROR
"Can't determine darwin ${sdk_name} SDK version. Error: ${xcrun_error}")
endif()
string(STRIP "${sdk_version}" sdk_version)
set(${out_var} "${sdk_version}" PARENT_SCOPE)
endif()
endfunction()
function(qt_internal_get_xcode_version out_var)
if(APPLE)
execute_process(COMMAND /usr/bin/xcrun xcodebuild -version
OUTPUT_VARIABLE xcode_version
ERROR_VARIABLE xcrun_error)
if(NOT xcode_version)
message(WARNING "Can't determine Xcode version. Error: ${xcrun_error}")
endif()
string(REPLACE "\n" " " xcode_version "${xcode_version}")
string(STRIP "${xcode_version}" xcode_version)
set(${out_var} "${xcode_version}" PARENT_SCOPE)
endif()
endfunction()
function(qt_auto_detect_darwin)
if(APPLE)
# If no CMAKE_OSX_DEPLOYMENT_TARGET is provided, default to a value that Qt defines.
# This replicates the behavior in mkspecs/common/macx.conf where
# QMAKE_MACOSX_DEPLOYMENT_TARGET is set.
set(description
"Minimum OS X version to target for deployment (at runtime); newer APIs weak linked. Set to empty string for default value.")
if(NOT CMAKE_OSX_DEPLOYMENT_TARGET)
if(NOT CMAKE_SYSTEM_NAME)
# macOS
set(version "10.14")
elseif(CMAKE_SYSTEM_NAME STREQUAL iOS)
set(version "12.0")
elseif(CMAKE_SYSTEM_NAME STREQUAL watchOS)
set(version "5.0")
elseif(CMAKE_SYSTEM_NAME STREQUAL tvOS)
set(version "12.0")
endif()
if(version)
set(CMAKE_OSX_DEPLOYMENT_TARGET "${version}" CACHE STRING "${description}")
endif()
endif()
qt_internal_get_darwin_sdk_version(darwin_sdk_version)
set(QT_MAC_SDK_VERSION "${darwin_sdk_version}" CACHE STRING "Darwin SDK version.")
qt_internal_get_xcode_version(xcode_version)
set(QT_MAC_XCODE_VERSION "${xcode_version}" CACHE STRING "Xcode version.")
endif()
endfunction()
function(qt_auto_detect_pch)
set(default_value "ON")
if(CMAKE_OSX_ARCHITECTURES AND CMAKE_VERSION VERSION_LESS 3.18.0 AND NOT QT_FORCE_PCH)
list(LENGTH CMAKE_OSX_ARCHITECTURES arch_count)
# CMake versions lower than 3.18 don't support PCH when multiple architectures are set.
# This is the case for simulator_and_device builds.
if(arch_count GREATER 1)
set(default_value "OFF")
message(WARNING "PCH support disabled due to usage of multiple architectures.")
endif()
endif()
option(BUILD_WITH_PCH "Build Qt using precompiled headers?" "${default_value}")
endfunction()
qt_auto_detect_cyclic_toolchain()
qt_auto_detect_cmake_config()
qt_auto_detect_darwin()
qt_auto_detect_ios()
qt_auto_detect_android()
qt_auto_detect_vpckg()
qt_auto_detect_pch()
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