Script to generate host functions from C with emscripten

compile_contract.sh

#!/bin/sh
# This script takes a rather dumb approach to declare external functions and
# tell emscripten not to link any library. This has the disadvantage that
# standard C libraries don't get linked either. This is fine if your WASM
# code doesn't need anything from the standard library. If your project is
# made of several modules, you need to #include them all which is not very
# nice.

if [ $# -lt 2 ]
then
  echo "Syntax: $0 <file name>"
  exit 0
fi

name=$1
emcc $name.c -s WASM=1 -s SIDE_MODULE=1 -O1 -o $name.wasm
wasm-dis $name.wasm > $name.wast