be44827240
This implements the build system bits required to build Qt as as separate wasm modules a.k.a Emscripten side modules. Enable by configuring with the "-shared" flag. This is the first step towards shared library support and gets us as far as being able to load QtCore and instantiate a QCoreApplication. Task-number: QTBUG-63925 Change-Id: Ib8f07f80fb5b13c8dbba65c7db735dc557b70d0e Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
110 lines
4.6 KiB
CMake
110 lines
4.6 KiB
CMake
# Copyright (C) 2022 The Qt Company Ltd.
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# SPDX-License-Identifier: BSD-3-Clause
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# WARNING must keep in sync with wasm-emscripten/qmake.conf!
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function (qt_internal_setup_wasm_target_properties wasmTarget)
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target_link_options("${wasmTarget}" INTERFACE
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"SHELL:-s MAX_WEBGL_VERSION=2"
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"SHELL:-s FETCH=1"
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"SHELL:-s WASM_BIGINT=1")
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target_link_libraries("${wasmTarget}" INTERFACE embind)
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# Enable MODULARIZE and set EXPORT_NAME, which makes it possible to
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# create application instances using a global constructor function,
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# e.g. let app_instance = await createQtAppInstance().
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# (as opposed to MODULARIZE=0, where Emscripten creates a global app
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# instance object at Javascript eval time)
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target_link_options("${wasmTarget}" INTERFACE
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"SHELL:-s MODULARIZE=1"
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"SHELL:-s EXPORT_NAME=createQtAppInstance")
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#simd
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if (QT_FEATURE_sse2)
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target_compile_options("${wasmTarget}" INTERFACE -O2 -msimd128 -msse -msse2)
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endif()
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set(disable_exceptions_catching 1)
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if (QT_FEATURE_exceptions)
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set(disable_exceptions_catching 0)
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endif()
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target_link_options("${wasmTarget}" INTERFACE "SHELL:-s DISABLE_EXCEPTION_CATCHING=${disable_exceptions_catching}")
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if (QT_FEATURE_thread)
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target_compile_options("${wasmTarget}" INTERFACE "SHELL:-pthread")
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target_link_options("${wasmTarget}" INTERFACE "SHELL:-pthread")
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else()
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target_link_options("${wasmTarget}" INTERFACE "SHELL:-s ALLOW_MEMORY_GROWTH=1")
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endif()
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# debug add_compile_options
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if ("QT_WASM_SOURCE_MAP=1" IN_LIST QT_QMAKE_DEVICE_OPTIONS)
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set(WASM_SOURCE_MAP_BASE "http://localhost:8000/")
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if(DEFINED QT_WASM_SOURCE_MAP_BASE)
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set(WASM_SOURCE_MAP_BASE "${QT_WASM_SOURCE_MAP_BASE}")
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endif()
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# Pass --source-map-base on the linker line. This informs the
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# browser where to find the source files when debugging.
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# -g4 to make source maps for debugging
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target_link_options("${wasmTarget}" INTERFACE "-gsource-map" "--source-map-base" "${WASM_SOURCE_MAP_BASE}")
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endif()
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# a few good defaults to make console more verbose while debugging
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target_link_options("${wasmTarget}" INTERFACE $<$<CONFIG:Debug>:
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"SHELL:-s DEMANGLE_SUPPORT=1"
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"SHELL:-s GL_DEBUG=1"
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--profiling-funcs>)
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# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s LIBRARY_DEBUG=1") # print out library calls, verbose
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# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s SYSCALL_DEBUG=1") # print out sys calls, verbose
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# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s FS_LOG=1") # print out filesystem ops, verbose
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# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s SOCKET_DEBUG") # print out socket,network data transfer
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if ("QT_EMSCRIPTEN_ASYNCIFY=1" IN_LIST QT_QMAKE_DEVICE_OPTIONS)
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# Emscripten recommends building with optimizations when using asyncify
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# in order to reduce wasm file size, and may also generate broken wasm
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# (with "wasm validation error: too many locals" type errors) if optimizations
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# are omitted. Enable optimizations also for debug builds.
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set(QT_CFLAGS_OPTIMIZE_DEBUG "-Os" CACHE STRING INTERNAL FORCE)
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set(QT_FEATURE_optimize_debug ON CACHE BOOL INTERNAL FORCE)
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target_link_options("${wasmTarget}" INTERFACE "SHELL:-s ASYNCIFY" "-Os")
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target_compile_definitions("${wasmTarget}" INTERFACE QT_HAVE_EMSCRIPTEN_ASYNCIFY)
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endif()
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# Set ASYNCIFY_IMPORTS unconditionally in order to support enabling asyncify at link time.
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target_link_options("${wasmTarget}" INTERFACE "SHELL:-sASYNCIFY_IMPORTS=qt_asyncify_suspend_js,qt_asyncify_resume_js")
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if(QT_FEATURE_shared)
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set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS TRUE)
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# plugins are SIDE_MODULE
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target_compile_options("${wasmTarget}" INTERFACE
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"$<$<STREQUAL:$<TARGET_PROPERTY:TYPE>,MODULE_LIBRARY>:" -s SIDE_MODULE=1>)
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target_link_options("${wasmTarget}" INTERFACE
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"$<$<STREQUAL:$<TARGET_PROPERTY:TYPE>,MODULE_LIBRARY>:" -s SIDE_MODULE=1>)
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# shared libs are SIDE_MODULE
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target_compile_options("${wasmTarget}" INTERFACE
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"$<$<STREQUAL:$<TARGET_PROPERTY:TYPE>,SHARED_LIBRARY>:" -s SIDE_MODULE=1>)
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target_link_options("${wasmTarget}" INTERFACE
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"$<$<STREQUAL:$<TARGET_PROPERTY:TYPE>,SHARED_LIBRARY>:" -s SIDE_MODULE=1>)
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else()
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target_link_options("${wasmTarget}" INTERFACE "SHELL:-s ERROR_ON_UNDEFINED_SYMBOLS=1")
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endif()
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endfunction()
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function(qt_internal_wasm_add_finalizers target)
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qt_add_list_file_finalizer(_qt_internal_add_wasm_extra_exported_methods ${target})
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endfunction()
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