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# 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 EXPORTED_RUNTIME_METHODS=[UTF16ToString,stringToUTF16] \
--bind \
-s FETCH=1 \
-s MODULARIZE=1 \
-s EXPORT_NAME=createQtAppInstance \
-s WASM_BIGINT=1
# The -s arguments can also be used with release builds,
# but are here in debug for clarity.
EMCC_COMMON_LFLAGS_DEBUG = \
$$EMCC_COMMON_LFLAGS \
-s DEMANGLE_SUPPORT=1 \
# -s LIBRARY_DEBUG=1 \ #print out library calls, verbose
# -s SYSCALL_DEBUG=1 \ #print out sys calls, verbose
# -s FS_LOG=1 \ #print out filesystem ops, verbose
# -s SOCKET_DEBUG \ #print out socket,network data transfer
-s GL_DEBUG=1 \
--profiling-funcs
QMAKE_LFLAGS_DEBUG += -g2
QMAKE_LFLAGS_RELEASE += -O2
QMAKE_COMPILER += emscripten
QMAKE_CC = emcc
QMAKE_CXX = em++
QMAKE_LINK = $$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_RESPONSEFILE_THRESHOLD = 1
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)
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