From 4972fdb350fe79e18b0413e74028cd9b9803f96b Mon Sep 17 00:00:00 2001 From: Lorn Potter Date: Thu, 3 Sep 2020 18:29:41 +1000 Subject: wasm: add cmake build support A few configure defines get changed: QMAKE_WASM_PTHREAD_POOL_SIZE is now QT_WASM_PTHREAD_POOL_SIZE QMAKE_WASM_TOTAL_MEMORY is now QT_WASM_INITIAL_MEMORY QMAKE_WASM_SOURCE_MAP_BASE is now QT_WASM_SOURCE_MAP_BASE device-option EMSCRIPTEN_ASYNCIFY=1 is QT_EMSCRIPTEN_ASYNCIFY=1 To create source maps for debugging. use device-option QT_WASM_SOURCE_MAP=1 Task-number: QTBUG-78647 Change-Id: If9f30cd7fb408c386d6d69b5f7b1beecf1ab44b5 Reviewed-by: Alexandru Croitor --- cmake/QtWasmHelpers.cmake | 92 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 cmake/QtWasmHelpers.cmake (limited to 'cmake/QtWasmHelpers.cmake') diff --git a/cmake/QtWasmHelpers.cmake b/cmake/QtWasmHelpers.cmake new file mode 100644 index 0000000000..1bbe5c928f --- /dev/null +++ b/cmake/QtWasmHelpers.cmake @@ -0,0 +1,92 @@ + +function (qt_internal_setup_wasm_target_properties wasmTarget) + + target_link_options("${wasmTarget}" INTERFACE "SHELL:-s EXIT_RUNTIME=1" + "SHELL:-s ERROR_ON_UNDEFINED_SYMBOLS=1" + "SHELL:-s EXTRA_EXPORTED_RUNTIME_METHODS=[UTF16ToString,stringToUTF16]" + "SHELL:-s USE_WEBGL2=1" + "--bind" + "SHELL:-s FETCH=1") + + # Hardcode wasm memory size. Emscripten does not currently support memory growth + # (ALLOW_MEMORY_GROWTH) in pthreads mode, and requires specifying the memory size + # at build time. Further, browsers limit the maximum initial memory size to 1GB. + # QT_WASM_INITIAL_MEMORY must be a multiple of 64KB (i.e. 65536) + if(NOT DEFINED QT_WASM_INITIAL_MEMORY AND QT_FEATURE_thread) + set(QT_WASM_INITIAL_MEMORY "1GB") + endif() + + if(DEFINED QT_WASM_INITIAL_MEMORY) + target_link_options("${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") + + if(DEFINED QT_WASM_PTHREAD_POOL_SIZE) + target_link_options("${wasmTarget}" INTERFACE "SHELL:-s PTHREAD_POOL_SIZE=${QT_WASM_PTHREAD_POOL_SIZE}") + message("Setting PTHREAD_POOL_SIZE to ${QT_WASM_PTHREAD_POOL_SIZE}") + endif() + + else() + target_link_options("${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 $<$: + 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() -- cgit v1.2.3