Squashed 'third_party/immer/' content from commit ad3e3556d

git-subtree-dir: third_party/immer
git-subtree-split: ad3e3556d38bb75966dd24c61a774970a7c7957e

extra/js/makefile

@@ -0,0 +1,29 @@
+
+BOOST=.
+EMCXX=em++
+EMCXXFLAGS=-O3 -std=c++14 --bind \
+	-I ../.. \
+	-I $(BOOST)
+WASM_BACKEND=0
+
+ALL= \
+	out/immer.asmjs.js \
+	out/immer.asmjs.html \
+	out/immer.wasm.js \
+	out/immer.wasm.html
+
+all: $(ALL)
+
+out/immer.asmjs.js: immer.cpp
+	@mkdir -p $(@D)
+	$(EMCXX) $(EMCXXFLAGS) $< -o $@
+
+out/immer.wasm.js: immer.cpp
+	@mkdir -p $(@D)
+	EMCC_WASM_BACKEND=$(WASM_BACKEND) $(EMCXX) -s WASM=1 $(EMCXXFLAGS) $< -o $@
+
+%.html: %.js index.tpl.html
+	sed s/%IMMER_JS%/`basename $<`/ < index.tpl.html > $@
+
+clean:
+	rm -f $(ALL)