#!/bin/bash
# needs wabt, binaryen and clang's wasm backend to work.
# https://github.com/WebAssembly/binaryen
# https://github.com/WebAssembly/wabt
# as far as i know, up to clang 6, you need to
# explicitly ask for the wasm backend to be built.
# you can look at llvm-build.sh in this directory for the
# llvm/clang build command i use.

fullname=$1
namelength=${#fullname}
offset=$((${#fullname} - 2))
filename=${fullname:0:$offset}
"clang" -emit-llvm --target=wasm32 -Oz "$1" -c
"llc" -asm-verbose=false -o $filename.s $filename.bc
"s2wasm" $filename.s > $filename.wast
"wast2wasm" $filename.wast -o $filename.wasm