Initial wasm support

Makefile

@@ -1,10 +1,25 @@
 .PHONY: install format test test-solidity test-cli test-integration test-workspace clean docs docs-build
 
+RUSTFLAGS_EMSCRIPTEN := \
+	-Clink-arg=-sEXPORTED_FUNCTIONS=_main,_free,_malloc \
+	-Clink-arg=-sNO_INVOKE_RUN \
+	-Clink-arg=-sEXIT_RUNTIME \
+	-Clink-arg=-sINITIAL_MEMORY=64MB \
+	-Clink-arg=-sTOTAL_MEMORY=3GB \
+	-Clink-arg=-sALLOW_MEMORY_GROWTH \
+	-Clink-arg=-sEXPORTED_RUNTIME_METHODS=FS,callMain,stringToNewUTF8,cwrap \
+	-Clink-arg=-sMODULARIZE \
+	-Clink-arg=-sEXPORT_ES6 \
+	-Clink-arg=--js-library=js/soljson_interface.js
+
 install: install-bin install-npm
 
 install-bin:
 	cargo install --path crates/solidity
 
+install-wasm:
+	RUSTFLAGS='$(RUSTFLAGS_EMSCRIPTEN)' cargo install --target wasm32-unknown-emscripten --path crates/solidity
+
 install-npm:
 	npm install && npm fund