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https://github.com/GoogleChromeLabs/squoosh.git
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7ce0c8a4fc
I was wondering why MozJPEG produces different Wasm binaries even when nothing is changed. After looking at the binary diffs, I think I have figured & fixed the reason.
66 lines
1.8 KiB
Makefile
66 lines
1.8 KiB
Makefile
CODEC_URL := https://github.com/mozilla/mozjpeg/archive/v3.3.1.tar.gz
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CODEC_DIR := node_modules/mozjpeg
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CODEC_OUT_RELATIVE := .libs/libjpeg.a rdswitch.o
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CODEC_OUT := $(addprefix $(CODEC_DIR)/, $(CODEC_OUT_RELATIVE))
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ENVIRONMENT = worker
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OUT_JS := enc/mozjpeg_enc.js enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js
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OUT_WASM := $(OUT_JS:.js=.wasm)
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.PHONY: all clean
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all: $(OUT_JS)
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# Define dependencies for all variations of build artifacts.
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$(filter enc/%,$(OUT_JS)): enc/mozjpeg_enc.cpp
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$(filter dec/%,$(OUT_JS)): dec/mozjpeg_dec.cpp
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enc/mozjpeg_node_enc.js dec/mozjpeg_node_dec.js: ENVIRONMENT = node
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%.js: $(CODEC_OUT)
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$(CXX) \
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-I $(CODEC_DIR) \
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${CXXFLAGS} \
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${LDFLAGS} \
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--closure 1 \
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--bind \
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-s ALLOW_MEMORY_GROWTH=1 \
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-s MODULARIZE=1 \
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-s TEXTDECODER=2 \
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-s ENVIRONMENT=$(ENVIRONMENT) \
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-s EXPORT_ES6=1 \
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-o $@ \
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$+
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# This one is a bit special: there is no rule for .libs/libjpeg.a
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# so we use libjpeg.la which implicitly builds that one instead.
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$(CODEC_DIR)/.libs/libjpeg.a: $(CODEC_DIR)/Makefile
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$(MAKE) -C $(CODEC_DIR) libjpeg.la
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$(CODEC_DIR)/rdswitch.o: $(CODEC_DIR)/Makefile
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$(MAKE) -C $(CODEC_DIR) rdswitch.o
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$(CODEC_DIR)/Makefile: $(CODEC_DIR)/configure
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cd $(CODEC_DIR) && ./configure \
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--disable-shared \
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--without-turbojpeg \
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--without-simd \
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--without-arith-enc \
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--without-arith-dec \
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--with-build-date=squoosh
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# ^ If not provided with a dummy value, MozJPEG includes a build date in the
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# binary as part of the version string, making binaries different each time.
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$(CODEC_DIR)/configure: $(CODEC_DIR)/configure.ac
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cd $(CODEC_DIR) && autoreconf -iv
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$(CODEC_DIR)/configure.ac: $(CODEC_DIR)
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$(CODEC_DIR):
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mkdir -p $@
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curl -sL $(CODEC_URL) | tar xz --strip 1 -C $@
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clean:
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$(RM) $(OUT_JS) $(OUT_WASM)
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$(MAKE) -C $(CODEC_DIR) clean
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