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wasm: allow setting total memory for non thread builds

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Using WASM_OBJECT_FILES does not allow memory growth, so we need to just
explicitly check for QMAKE_WASM_TOTAL_MEMORY

Change-Id: I447113972dfc3df4ee4073e8cc25481646d1507b
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
This commit is contained in:
Lorn Potter 2019-06-19 15:54:48 +10:00
parent d5c684c3c3
commit 987cca7bca
1 changed files with 14 additions and 10 deletions
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24
mkspecs/features/wasm/wasm.prf
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@ -6,16 +6,6 @@ exists($$QMAKE_QT_CONFIG) {
qtConfig(thread) {
EMCC_THREAD_LFLAGS += -s USE_PTHREADS=1
# Hardcode wasm memory size. Emscripten does not currently support memory growth
# (ALLOW_MEMORY_GROWTH) in pthreads mode, and requires specifying the memory size
# at build time. Further, browsers limit the maximum initial memory size to 1GB.
TOTAL_MEMORY = 1GB
!isEmpty(QMAKE_WASM_TOTAL_MEMORY) {
TOTAL_MEMORY = $$QMAKE_WASM_TOTAL_MEMORY
}
message("Setting TOTAL_MEMORY to" $$TOTAL_MEMORY)
EMCC_THREAD_LFLAGS += -s TOTAL_MEMORY=$$TOTAL_MEMORY
# Create worker threads at startup. This is supposed to be an optimization,
# however exceeding the pool size has been obesverved to hang the application.
@ -29,6 +19,20 @@ exists($$QMAKE_QT_CONFIG) {
} else {
EMCC_THREAD_LFLAGS += -s ALLOW_MEMORY_GROWTH=1
}
qtConfig(thread) | !isEmpty(QMAKE_WASM_TOTAL_MEMORY) {
# Hardcode wasm memory size. Emscripten does not currently support memory growth
# (ALLOW_MEMORY_GROWTH) in pthreads mode, and requires specifying the memory size
# at build time. Further, browsers limit the maximum initial memory size to 1GB.
# QMAKE_WASM_TOTAL_MEMORY must be a multiple of 64KB
TOTAL_MEMORY = 1GB
!isEmpty(QMAKE_WASM_TOTAL_MEMORY) {
TOTAL_MEMORY = $$QMAKE_WASM_TOTAL_MEMORY
}
message("Setting TOTAL_MEMORY to" $$TOTAL_MEMORY)
EMCC_THREAD_LFLAGS += -s TOTAL_MEMORY=$$TOTAL_MEMORY
}
QMAKE_LFLAGS += $$EMCC_THREAD_LFLAGS
QMAKE_LFLAGS_DEBUG += $$EMCC_THREAD_LFLAGS
QMAKE_CFLAGS += $$EMCC_THREAD_LFLAGS