# qmake configuration for building with emscripten MAKEFILE_GENERATOR = UNIX QMAKE_PLATFORM = wasm unix include(../common/gcc-base.conf) include(../common/clang.conf) load(device_config) load(emcc_ver) # Support enabling asyncify by configuring with "-device-option QT_EMSCRIPTEN_ASYNCIFY=1" !isEmpty(QT_EMSCRIPTEN_ASYNCIFY): { !equals(QT_EMSCRIPTEN_ASYNCIFY, 1):!equals(QT_EMSCRIPTEN_ASYNCIFY, 0): \ message(Error: The value for QT_EMSCRIPTEN_ASYNCIFY must be 0 or 1) equals(QT_EMSCRIPTEN_ASYNCIFY, 1): { QMAKE_CFLAGS += -DQT_HAVE_EMSCRIPTEN_ASYNCIFY QMAKE_CXXFLAGS += -DQT_HAVE_EMSCRIPTEN_ASYNCIFY QMAKE_LFLAGS += -s ASYNCIFY # 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. QMAKE_LFLAGS_DEBUG += -Os # Declare all async functions QMAKE_LFLAGS += -s \'ASYNCIFY_IMPORTS=[\"qt_asyncify_suspend_js\", \"qt_asyncify_resume_js\", \"emscripten_sleep\"]\' } } EMCC_COMMON_LFLAGS += \ -s WASM=1 \ -s FULL_ES2=1 \ -s FULL_ES3=1 \ -s USE_WEBGL2=1 \ -s ERROR_ON_UNDEFINED_SYMBOLS=1 \ -s EXTRA_EXPORTED_RUNTIME_METHODS=[\"UTF16ToString\",\"stringToUTF16\"] \ --bind \ -s FETCH=1 \ -s MODULARIZE=1 \ -s EXPORT_NAME=createQtAppInstance # The -s arguments can also be used with release builds, # but are here in debug for clarity. EMCC_COMMON_LFLAGS_DEBUG = \ $$EMCC_COMMON_LFLAGS \ -s ASSERTIONS=2 \ -s DEMANGLE_SUPPORT=1 \ # -s LIBRARY_DEBUG=1 \ #print out library calls, verbose # -s SYSCALL_DEBUG=1 \ #print out sys calls, verbose # -s FS_LOG=1 \ #print out filesystem ops, verbose # -s SOCKET_DEBUG \ #print out socket,network data transfer -s GL_DEBUG=1 \ --profiling-funcs QMAKE_LFLAGS_DEBUG += -g2 QMAKE_LFLAGS_RELEASE += -O2 QMAKE_COMPILER += emscripten QMAKE_CC = emcc QMAKE_CXX = em++ QMAKE_LINK = $$QMAKE_CXX QMAKE_LINK_SHLIB = $$QMAKE_CXX QMAKE_LINK_C = $$QMAKE_CC QMAKE_LINK_C_SHLIB = $$QMAKE_CC QMAKE_LIBS_THREAD = $$QMAKE_CFLAGS_THREAD QMAKE_LFLAGS += $$EMCC_COMMON_LFLAGS QMAKE_LFLAGS_DEBUG += $$EMCC_COMMON_LFLAGS_DEBUG QMAKE_PREFIX_SHLIB = lib QMAKE_EXTENSION_SHLIB = so # llvm bitcode, linked to js in post_link QMAKE_PREFIX_STATICLIB = lib QMAKE_EXTENSION_STATICLIB = a # llvm bitcode QMAKE_AR = emar cqs equals(QMAKE_HOST.os, Windows) { QMAKE_LINK_OBJECT_MAX = 10 QMAKE_LINK_OBJECT_SCRIPT = object_script QMAKE_AR_CMD = \ "$(file >$(OBJECTS_DIR)/$(TARGET).rsp, $(subst \\,/,$(OBJECTS)))$$escape_expand(\\n\\t)" \ "$(AR) $(DESTDIR)$(TARGET) @$(OBJECTS_DIR)/$(TARGET).rsp" } QMAKE_DISTCLEAN += *.html *.js *.wasm load(qt_config)