qt5base-lts/cmake/QtWasmHelpers.cmake
Morten Sørvig f347682fd5 wasm: include asyncify support unconditionally
Emscripten's option for enabling asyncify (-sASYNCIFY) is a link-time
option, which means there is no requirement to have a separate asyncify
build, at least for static builds.

Replace the current QT_HAVE_EMSCRIPTEN_ASYNCIFY compile-time option
with a run-time option which checks if the asyncify API is available.

Keep support for configuring with "-device-option QT_EMSCRIPTEN_ASYNCIFY=1"
for backwards compatibility and for the use case where want asyncify
support to be on by default for a given Qt build.

Enable asyncify for the asyncify_exec example.

Pick-to: 6.4
Change-Id: I301fd7e2d3c0367532c886f4e34b23e1093646ad
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
2022-08-17 04:52:46 +02:00

92 lines
3.9 KiB
CMake

# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
# WARNING must keep in sync with wasm-emscripten/qmake.conf!
function (qt_internal_setup_wasm_target_properties wasmTarget)
target_link_options("${wasmTarget}" INTERFACE
"SHELL:-s ERROR_ON_UNDEFINED_SYMBOLS=1"
"SHELL:-s MAX_WEBGL_VERSION=2"
"SHELL:-s FETCH=1"
"SHELL:-s WASM_BIGINT=1")
target_link_libraries("${wasmTarget}" INTERFACE embind)
# Enable MODULARIZE and set EXPORT_NAME, which makes it possible to
# create application instances using a global constructor function,
# e.g. let app_instance = await createQtAppInstance().
# (as opposed to MODULARIZE=0, where Emscripten creates a global app
# instance object at Javascript eval time)
target_link_options("${wasmTarget}" INTERFACE
"SHELL:-s MODULARIZE=1"
"SHELL:-s EXPORT_NAME=createQtAppInstance")
#simd
if (QT_FEATURE_sse2)
target_compile_options("${wasmTarget}" INTERFACE -O2 -msimd128 -msse -msse2)
endif()
set(disable_exceptions_catching 1)
if (QT_FEATURE_exceptions)
set(disable_exceptions_catching 0)
endif()
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s DISABLE_EXCEPTION_CATCHING=${disable_exceptions_catching}")
if (QT_FEATURE_thread)
target_compile_options("${wasmTarget}" INTERFACE "SHELL:-pthread")
target_link_options("${wasmTarget}" INTERFACE "SHELL:-pthread")
else()
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s ALLOW_MEMORY_GROWTH=1")
endif()
# debug add_compile_options
if ("QT_WASM_SOURCE_MAP=1" IN_LIST QT_QMAKE_DEVICE_OPTIONS)
set(WASM_SOURCE_MAP_BASE "http://localhost:8000/")
if(DEFINED QT_WASM_SOURCE_MAP_BASE)
set(WASM_SOURCE_MAP_BASE "${QT_WASM_SOURCE_MAP_BASE}")
endif()
# Pass --source-map-base on the linker line. This informs the
# browser where to find the source files when debugging.
# -g4 to make source maps for debugging
target_link_options("${wasmTarget}" INTERFACE "-gsource-map" "--source-map-base" "${WASM_SOURCE_MAP_BASE}")
endif()
# a few good defaults to make console more verbose while debugging
target_link_options("${wasmTarget}" INTERFACE $<$<CONFIG:Debug>:
"SHELL:-s DEMANGLE_SUPPORT=1"
"SHELL:-s GL_DEBUG=1"
--profiling-funcs>)
# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s LIBRARY_DEBUG=1") # print out library calls, verbose
# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s SYSCALL_DEBUG=1") # print out sys calls, verbose
# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s FS_LOG=1") # print out filesystem ops, verbose
# target_link_options("${wasmTarget}" INTERFACE "SHELL:-s SOCKET_DEBUG") # print out socket,network data transfer
if ("QT_EMSCRIPTEN_ASYNCIFY=1" IN_LIST QT_QMAKE_DEVICE_OPTIONS)
# Emscripten recommends building with optimizations when using asyncify
# in order to reduce wasm file size, and may also generate broken wasm
# (with "wasm validation error: too many locals" type errors) if optimizations
# are omitted. Enable optimizations also for debug builds.
set(QT_CFLAGS_OPTIMIZE_DEBUG "-Os" CACHE STRING INTERNAL FORCE)
set(QT_FEATURE_optimize_debug ON CACHE BOOL INTERNAL FORCE)
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s ASYNCIFY" "-Os")
target_compile_definitions("${wasmTarget}" INTERFACE QT_HAVE_EMSCRIPTEN_ASYNCIFY)
endif()
# Set ASYNCIFY_IMPORTS unconditionally in order to support enabling asyncify at link time.
target_link_options("${wasmTarget}" INTERFACE "SHELL:-sASYNCIFY_IMPORTS=qt_asyncify_suspend_js,qt_asyncify_resume_js")
endfunction()
function(qt_internal_wasm_add_finalizers target)
qt_add_list_file_finalizer(_qt_internal_add_wasm_extra_exported_methods ${target})
endfunction()