Add script to compile jq to WASM

compile.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# Compile jq to WebAssembly
+# Need Emscripten installed
+
+# Update jq repo and its submodules
+cd jq
+git submodule update --init
+
+# Generate ./configure file
+autoreconf -fi
+
+# Run ./configure
+emconfigure ./configure \
+ --with-oniguruma=builtin \
+ --disable-maintainer-mode
+
+# Build jq executable
+emmake make LDFLAGS=-all-static
+
+# Convert to .o; otherwise emcc complains
+# that the "file has an unknown suffix"
+cp jq ../jq.o
+cd ..
+
+# Compile to WebAssembly (we need .js/.wasm files; we can't execute jq.o in the browser)
+# - Use "ERROR_ON_UNDEFINED_SYMBOLS=0" to ignore "undefined symbol: llvm_fma_f64" warning
+emcc jq.o -o jq.js \
+ -s ERROR_ON_UNDEFINED_SYMBOLS=0