CMake: Split and clean up WebAssembly auto-detection code
Split qt_auto_detect_wasm into multiple helper functions and place them in a new QtPublicWasmToolchainHelpers.cmake file. We want to use them to try and detect the CMake toolchain file location from within the generated qt.toolchain.cmake file whem configuring a user project. Pick-to: 6.2 Task-number: QTBUG-96843 Change-Id: Id8c2350e6dbe3c994b435681353bdaee114249a7 Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
This commit is contained in:
Alexandru Croitor
parent
a0e56294c1
commit
c7d9e05a2b
@ -16,57 +16,46 @@ function(qt_internal_ensure_static_qt_config)
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endif()
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endfunction()
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include("${CMAKE_CURRENT_LIST_DIR}/QtPublicWasmToolchainHelpers.cmake")
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function(qt_auto_detect_wasm)
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if("${QT_QMAKE_TARGET_MKSPEC}" STREQUAL "wasm-emscripten")
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if (NOT DEFINED ENV{EMSDK})
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message(FATAL_ERROR
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"Can't find EMSDK! Make sure EMSDK environment variable "
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"is available and emcc is in your path.")
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"Can't find an Emscripten SDK! Make sure the EMSDK environment variable is "
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"available by activating and sourcing the emscripten sdk. Also ensure emcc is in "
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"your path.")
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endif()
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if(NOT DEFINED QT_AUTODETECT_WASM)
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# detect EMSCRIPTEN_ROOT path
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file(READ "$ENV{EMSDK}/.emscripten" ver)
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string(REGEX MATCH "EMSCRIPTEN_ROOT.*$" EMROOT "${ver}")
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string(REGEX MATCH "'([^' ]*)'" EMROOT2 "${EMROOT}")
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string(REPLACE "'" "" EMROOT_PATH "${EMROOT2}")
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if(NOT DEFINED QT_AUTODETECT_WASM_IS_DONE)
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message(STATUS "Extracting Emscripten SDK info from EMSDK env var: $ENV{EMSDK}")
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__qt_internal_get_emroot_path_suffix_from_emsdk_env(EMROOT_PATH)
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# get emscripten version
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if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
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set (EXECUTE_COMMANDPATH "$ENV{EMSDK}/${EMROOT_PATH}/emcc.bat")
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else()
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set (EXECUTE_COMMANDPATH "$ENV{EMSDK}/${EMROOT_PATH}/emcc")
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endif()
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file(TO_NATIVE_PATH "${EXECUTE_COMMANDPATH}" EXECUTE_COMMAND)
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execute_process(COMMAND ${EXECUTE_COMMAND} --version
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OUTPUT_VARIABLE emOutput
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_VARIABLE emrun_error
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RESULT_VARIABLE result)
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if(NOT emOutput)
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message(FATAL_ERROR
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"Can't determine Emscripten version! Error: ${emrun_error}")
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endif()
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string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" CMAKE_EMSDK_REGEX_VERSION "${emOutput}")
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__qt_internal_query_emsdk_version("${EMROOT_PATH}" TRUE CMAKE_EMSDK_REGEX_VERSION)
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set(EMCC_VERSION "${CMAKE_EMSDK_REGEX_VERSION}" CACHE STRING INTERNAL FORCE)
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# find toolchain file
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# Find toolchain file
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if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
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set(wasm_toolchain_file "$ENV{EMSDK}/${EMROOT_PATH}/cmake/Modules/Platform/Emscripten.cmake")
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__qt_internal_get_emscripten_cmake_toolchain_file_path_from_emsdk_env(
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"${EMROOT_PATH}" wasm_toolchain_file)
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set(CMAKE_TOOLCHAIN_FILE "${wasm_toolchain_file}" CACHE STRING "" FORCE)
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endif()
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if(EXISTS "${CMAKE_TOOLCHAIN_FILE}")
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message(STATUS "Emscripten ${CMAKE_EMSDK_REGEX_VERSION} toolchain file detected at ${CMAKE_TOOLCHAIN_FILE}")
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message(STATUS
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"Emscripten ${EMCC_VERSION} toolchain file detected at ${CMAKE_TOOLCHAIN_FILE}")
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else()
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message(FATAL_ERROR "Cannot find the toolchain file Emscripten.cmake. "
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"Please specify the toolchain file with -DCMAKE_TOOLCHAIN_FILE=<file>.")
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message(FATAL_ERROR
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"Cannot find the toolchain file Emscripten.cmake. "
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"Please specify the toolchain file with -DCMAKE_TOOLCHAIN_FILE=<file> "
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"or provide a path to a valid emscripten installation via the EMSDK "
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"environment variable.")
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endif()
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set(QT_AUTODETECT_WASM TRUE CACHE BOOL "")
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qt_internal_ensure_static_qt_config()
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# this version of Qt needs this version of emscripten
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set(QT_EMCC_RECOMMENDED_VERSION 2.0.14 CACHE STRING INTERNAL FORCE)
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__qt_internal_get_emcc_recommended_version(recommended_version)
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set(QT_EMCC_RECOMMENDED_VERSION "${recommended_version}" CACHE STRING INTERNAL FORCE)
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set(QT_AUTODETECT_WASM_IS_DONE TRUE CACHE BOOL "")
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endif()
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endif()
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endfunction()
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@ -285,6 +285,10 @@ set(__public_cmake_helpers
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cmake/QtPublicWalkLibsHelpers.cmake
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cmake/QtPublicFindPackageHelpers.cmake
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cmake/QtPublicDependencyHelpers.cmake
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# Public CMake files that are installed next Qt6Config.cmake, but are NOT included by it.
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# Instead they are included by the generated CMake toolchain file.
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cmake/QtPublicWasmToolchainHelpers.cmake
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)
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qt_copy_or_install(FILES ${__public_cmake_helpers} DESTINATION "${__GlobalConfig_install_dir}")
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55
cmake/QtPublicWasmToolchainHelpers.cmake
Normal file
55
cmake/QtPublicWasmToolchainHelpers.cmake
Normal file
@ -0,0 +1,55 @@
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# Assuming EMSDK == /path/emsdk
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#
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# Then we expect /path/emsdk/.emscripten file to contain the following line
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# EMSCRIPTEN_ROOT = emsdk_path + '/upstream/emscripten'
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#
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# then we set out_var to '/upstream/emscripten', so it's not a full path
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function(__qt_internal_get_emroot_path_suffix_from_emsdk_env out_var)
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# Query EMSCRIPTEN_ROOT path.
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file(READ "$ENV{EMSDK}/.emscripten" ver)
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string(REGEX MATCH "EMSCRIPTEN_ROOT.*$" EMROOT "${ver}")
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string(REGEX MATCH "'([^' ]*)'" EMROOT2 "${EMROOT}")
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string(REPLACE "'" "" EMROOT_PATH "${EMROOT2}")
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set(${out_var} "${EMROOT_PATH}" PARENT_SCOPE)
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endfunction()
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function(__qt_internal_get_emscripten_cmake_toolchain_file_path_from_emsdk_env emroot_path out_var)
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set(wasm_toolchain_file "$ENV{EMSDK}/${emroot_path}/cmake/Modules/Platform/Emscripten.cmake")
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set(${out_var} "${wasm_toolchain_file}" PARENT_SCOPE)
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endfunction()
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function(__qt_internal_query_emsdk_version emroot_path is_fatal out_var)
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# get emscripten version
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if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
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set(EXECUTE_COMMANDPATH "$ENV{EMSDK}/${emroot_path}/emcc.bat")
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else()
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set(EXECUTE_COMMANDPATH "$ENV{EMSDK}/${emroot_path}/emcc")
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endif()
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file(TO_NATIVE_PATH "${EXECUTE_COMMANDPATH}" EXECUTE_COMMAND)
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execute_process(COMMAND ${EXECUTE_COMMAND} --version
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OUTPUT_VARIABLE emOutput
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OUTPUT_STRIP_TRAILING_WHITESPACE
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ERROR_VARIABLE emrun_error
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RESULT_VARIABLE result)
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message(DEBUG "emcc --version output: ${emOutput}")
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if(NOT emOutput)
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if(is_fatal)
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message(FATAL_ERROR
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"Couldn't determine Emscripten version from running ${EXECUTE_COMMAND} --version. "
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"Error: ${emrun_error}")
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endif()
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set(${out_var} "" PARENT_SCOPE)
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else()
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string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" CMAKE_EMSDK_REGEX_VERSION "${emOutput}")
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set(${out_var} "${CMAKE_EMSDK_REGEX_VERSION}" PARENT_SCOPE)
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endif()
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endfunction()
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function(__qt_internal_get_emcc_recommended_version out_var)
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# This version of Qt needs this version of emscripten.
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set(QT_EMCC_RECOMMENDED_VERSION "2.0.14")
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set(${out_var} "${QT_EMCC_RECOMMENDED_VERSION}" PARENT_SCOPE)
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endfunction()
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