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function (qt_internal_setup_wasm_target_properties wasmTarget)
target_link_options("${wasmTarget}" INTERFACE
"SHELL:-s ERROR_ON_UNDEFINED_SYMBOLS=1"
"SHELL:-s EXTRA_EXPORTED_RUNTIME_METHODS=[UTF16ToString,stringToUTF16]"
"SHELL:-s USE_WEBGL2=1"
"--bind"
"SHELL:-s FETCH=1")
# Enable MODULARIZE and set EXPORT_NAME, which makes it possible to
# create application instances using a global constructor function,
# e.g. let app_instance = await createQtAppInstance().
# (as opposed to MODULARIZE=0, where Emscripten creates a global app
# instance object at Javascript eval time)
target_link_options("${wasmTarget}" INTERFACE
"SHELL:-s MODULARIZE=1"
"SHELL:-s EXPORT_NAME=createQtAppInstance")
target_compile_options("${wasmTarget}" INTERFACE --bind)
# Hardcode wasm memory size. Emscripten does not currently support memory growth
# (ALLOW_MEMORY_GROWTH) in pthreads mode, and requires specifying the memory size
# at build time. Further, browsers limit the maximum initial memory size to 1GB.
# QT_WASM_INITIAL_MEMORY must be a multiple of 64KB (i.e. 65536)
if(NOT DEFINED QT_WASM_INITIAL_MEMORY AND QT_FEATURE_thread)
set(QT_WASM_INITIAL_MEMORY "1GB")
endif()
if(DEFINED QT_WASM_INITIAL_MEMORY)
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s INITIAL_MEMORY=${QT_WASM_INITIAL_MEMORY}")
message("Setting INITIAL_MEMORY to ${QT_WASM_INITIAL_MEMORY}")
endif()
if (QT_FEATURE_opengles3)
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s FULL_ES3=1")
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s FULL_ES3=1"
"SHELL:-s MAX_WEBGL_VERSION=2"
"SHELL:-s WEBGL2_BACKWARDS_COMPATIBILITY_EMULATION=1")
else()
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s FULL_ES2=1")
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("${wasmTarget}" INTERFACE "SHELL:-s USE_PTHREADS=1")
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s USE_PTHREADS=1")
set(POOL_SIZE 4)
if(DEFINED QT_WASM_PTHREAD_POOL_SIZE)
set(POOL_SIZE ${QT_WASM_PTHREAD_POOL_SIZE})
endif()
target_link_options("${wasmTarget}" INTERFACE "SHELL:-s PTHREAD_POOL_SIZE=${POOL_SIZE}")
message("Setting PTHREAD_POOL_SIZE to ${POOL_SIZE}")
else()
target_link_options("${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 "-g4" "--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"
"SHELL:-s ASSERTIONS=2"
--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()
endfunction()
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