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wasm: remove compiler and linker warnings

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INITIAL_MEMORY and PTHREAD_POOL_SIZE are linker flags only
USE_PTHREADS is both linker and compiler arguments.

Also increase default INITIAL_MEMORY

Pick-to: 6.3
Change-Id: Id1998efbf1d6de901f404db7e988f6cafd547a39
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This commit is contained in:
Lorn Potter 2021-11-23 18:50:41 +10:00
parent d0cae531e6
commit d10b910e39
2 changed files with 31 additions and 23 deletions
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42
mkspecs/features/wasm/wasm.prf
View File

@ -9,8 +9,8 @@ exists($$QMAKE_QT_CONFIG) {
qtConfig(thread) {
EMCC_THREAD_LFLAGS += -pthread
EMCC_THREAD_CFLAGS += -pthread
EMCC_LFLAGS += -pthread
EMCC_CFLAGS += -pthread
# Create worker threads at startup. This is supposed to be an optimization,
# however exceeding the pool size has been obesverved to hang the application.
@ -20,24 +20,30 @@ exists($$QMAKE_QT_CONFIG) {
}
message("Setting PTHREAD_POOL_SIZE to" $$POOL_SIZE)
EMCC_THREAD_LFLAGS += -s PTHREAD_POOL_SIZE=$$POOL_SIZE
EMCC_LFLAGS += -s PTHREAD_POOL_SIZE=$$POOL_SIZE
} else {
EMCC_THREAD_LFLAGS += -s ALLOW_MEMORY_GROWTH=1
EMCC_LFLAGS += -s ALLOW_MEMORY_GROWTH=1
}
qtConfig(thread) | !isEmpty(QT_WASM_INITIAL_MEMORY) {
isEmpty(QT_WASM_INITIAL_MEMORY) {
# Hardcode wasm memory size.
# Hardcode wasm memory size. Emscripten does not currently support memory growth
# (ALLOW_MEMORY_GROWTH) in pthreads mode, and requires specifying the memory size
# at build time. Further, browsers limit the maximum initial memory size to 1GB.
# QT_WASM_INITIAL_MEMORY must be a multiple of 64KB
qtConfig(thread) {
# Pthreads and ALLOW_MEMORY_GROWTH can cause javascript wasm memory access to
# be slow. Instead, we specify the memory size
# at build time. Further, browsers limit the maximum initial memory size to 1GB.
# https://github.com/WebAssembly/design/issues/1271
INITIAL_MEMORY = 1GB
!isEmpty(QT_WASM_INITIAL_MEMORY) {
INITIAL_MEMORY = $$QT_WASM_INITIAL_MEMORY
}
message("Setting INITIAL_MEMORY to" $$INITIAL_MEMORY)
EMCC_THREAD_LFLAGS += -s INITIAL_MEMORY=$$INITIAL_MEMORY
} else {
INITIAL_MEMORY = 50MB # emscripten default is 16MB, we need slightly more
}
} else {
# QT_WASM_INITIAL_MEMORY must be a multiple of 64KB (i.e. 65536)
INITIAL_MEMORY = $$QT_WASM_INITIAL_MEMORY
message("Setting INITIAL_MEMORY to" $$INITIAL_MEMORY)
}
EMCC_LFLAGS += -s INITIAL_MEMORY=$$INITIAL_MEMORY
message("Setting INITIAL_MEMORY to" $$INITIAL_MEMORY)
qtConfig(sse2) {
QMAKE_CFLAGS += -O2 -msimd128 -msse -msse2
@ -46,10 +52,10 @@ exists($$QMAKE_QT_CONFIG) {
QMAKE_LFLAGS_DEBUG += -msimd128 -msse -msse2
}
QMAKE_LFLAGS += $$EMCC_THREAD_LFLAGS
QMAKE_LFLAGS_DEBUG += $$EMCC_THREAD_LFLAGS
QMAKE_CFLAGS += $$EMCC_THREAD_CFLAGS
QMAKE_CXXFLAGS += $$EMCC_THREAD_CFLAGS
QMAKE_LFLAGS += $$EMCC_LFLAGS
QMAKE_LFLAGS_DEBUG += $$EMCC_LFLAGS
QMAKE_CFLAGS += $$EMCC_CFLAGS
QMAKE_CXXFLAGS += $$EMCC_CFLAGS
}
# Create js and wasm files for applications

12
src/corelib/Qt6WasmMacros.cmake
View File

@ -30,23 +30,25 @@ function(_qt_internal_wasm_add_target_helpers target)
message(DEBUG "Setting PTHREAD_POOL_SIZE to ${POOL_SIZE} for ${target}")
endif()
# Hardcode wasm memory size. Emscripten does not currently support memory growth
# (ALLOW_MEMORY_GROWTH) in pthreads mode, and requires specifying the memory size
# at build time. Further, browsers limit the maximum initial memory size to 1GB.
# QT_WASM_INITIAL_MEMORY must be a multiple of 64KB (i.e. 65536)
# Hardcode wasm memory size.
get_target_property(_tmp_initialMemory "${target}" QT_WASM_INITIAL_MEMORY)
if(_tmp_initialMemory)
set(QT_WASM_INITIAL_MEMORY "${_tmp_initialMemory}")
elseif(NOT DEFINED QT_WASM_INITIAL_MEMORY)
if(QT_FEATURE_thread)
# Pthreads and ALLOW_MEMORY_GROWTH can cause javascript wasm memory access to
# be slow and having to update HEAP* views. Instead, we specify the memory size
# at build time. Further, browsers limit the maximum initial memory size to 1GB.
# https://github.com/WebAssembly/design/issues/1271
set(QT_WASM_INITIAL_MEMORY "1GB")
else()
# emscripten default is 16MB, we need slightly more sometimes
set(QT_WASM_INITIAL_MEMORY "20MB")
set(QT_WASM_INITIAL_MEMORY "50MB")
endif()
endif()
if(DEFINED QT_WASM_INITIAL_MEMORY)
# QT_WASM_INITIAL_MEMORY must be a multiple of 65536
target_link_options("${target}"
PRIVATE "SHELL:-s INITIAL_MEMORY=${QT_WASM_INITIAL_MEMORY}")
message(DEBUG "-- Setting INITIAL_MEMORY to ${QT_WASM_INITIAL_MEMORY} for ${target}")