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| author | Alexandru Croitor <alexandru.croitor@qt.io> | 2021-09-24 17:06:02 +0200 |
|---|---|---|
| committer | Alexandru Croitor <alexandru.croitor@qt.io> | 2021-09-27 18:29:44 +0200 |
| commit | c7d9e05a2bd55f03a01b5319338828197e81bc39 (patch) | |
| tree | 7d7444f379ac88101916f5471e63ee5ffe422e1b /cmake/QtPublicWasmToolchainHelpers.cmake | |
| parent | a0e56294c1e80f34147c5a992b314776e1b6c757 (diff) | |
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>
Diffstat (limited to 'cmake/QtPublicWasmToolchainHelpers.cmake')
| -rw-r--r-- | cmake/QtPublicWasmToolchainHelpers.cmake | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/cmake/QtPublicWasmToolchainHelpers.cmake b/cmake/QtPublicWasmToolchainHelpers.cmake new file mode 100644 index 0000000000..53d74e0234 --- /dev/null +++ b/cmake/QtPublicWasmToolchainHelpers.cmake @@ -0,0 +1,55 @@ +# Assuming EMSDK == /path/emsdk +# +# Then we expect /path/emsdk/.emscripten file to contain the following line +# EMSCRIPTEN_ROOT = emsdk_path + '/upstream/emscripten' +# +# then we set out_var to '/upstream/emscripten', so it's not a full path +function(__qt_internal_get_emroot_path_suffix_from_emsdk_env out_var) + # Query EMSCRIPTEN_ROOT path. + file(READ "$ENV{EMSDK}/.emscripten" ver) + string(REGEX MATCH "EMSCRIPTEN_ROOT.*$" EMROOT "${ver}") + string(REGEX MATCH "'([^' ]*)'" EMROOT2 "${EMROOT}") + string(REPLACE "'" "" EMROOT_PATH "${EMROOT2}") + + set(${out_var} "${EMROOT_PATH}" PARENT_SCOPE) +endfunction() + +function(__qt_internal_get_emscripten_cmake_toolchain_file_path_from_emsdk_env emroot_path out_var) + set(wasm_toolchain_file "$ENV{EMSDK}/${emroot_path}/cmake/Modules/Platform/Emscripten.cmake") + set(${out_var} "${wasm_toolchain_file}" PARENT_SCOPE) +endfunction() + +function(__qt_internal_query_emsdk_version emroot_path is_fatal out_var) + # get emscripten version + if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows") + set(EXECUTE_COMMANDPATH "$ENV{EMSDK}/${emroot_path}/emcc.bat") + else() + set(EXECUTE_COMMANDPATH "$ENV{EMSDK}/${emroot_path}/emcc") + endif() + + file(TO_NATIVE_PATH "${EXECUTE_COMMANDPATH}" EXECUTE_COMMAND) + execute_process(COMMAND ${EXECUTE_COMMAND} --version + OUTPUT_VARIABLE emOutput + OUTPUT_STRIP_TRAILING_WHITESPACE + ERROR_VARIABLE emrun_error + RESULT_VARIABLE result) + message(DEBUG "emcc --version output: ${emOutput}") + + if(NOT emOutput) + if(is_fatal) + message(FATAL_ERROR + "Couldn't determine Emscripten version from running ${EXECUTE_COMMAND} --version. " + "Error: ${emrun_error}") + endif() + set(${out_var} "" PARENT_SCOPE) + else() + string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" CMAKE_EMSDK_REGEX_VERSION "${emOutput}") + set(${out_var} "${CMAKE_EMSDK_REGEX_VERSION}" PARENT_SCOPE) + endif() +endfunction() + +function(__qt_internal_get_emcc_recommended_version out_var) + # This version of Qt needs this version of emscripten. + set(QT_EMCC_RECOMMENDED_VERSION "2.0.14") + set(${out_var} "${QT_EMCC_RECOMMENDED_VERSION}" PARENT_SCOPE) +endfunction() |