#!/bin/bash

set -e

# Remove quotes, add leading underscores, remove newlines, remove trailing comma.
EXPORTED_FUNCTIONS=$(                     \
    cat lib/src/wasm/stdlib-symbols.txt | \
    sed -e 's/"//g'                     | \
    sed -e 's/^/_/g'                    | \
    tr -d '\n"'                         | \
    sed -e 's/,$//'                       \
)

emcc                                                          \
    -o stdlib.wasm                                            \
    -Os                                                       \
    --no-entry                                                \
    -s MAIN_MODULE=2                                          \
    -s "EXPORTED_FUNCTIONS=${EXPORTED_FUNCTIONS}" \
    -s 'ALLOW_MEMORY_GROWTH'                                  \
    -s 'TOTAL_MEMORY=4MB'                                     \
    -fvisibility=hidden                                       \
    -fno-exceptions                                           \
    -xc                                                       \
    /dev/null

xxd -C -i stdlib.wasm > lib/src/wasm/wasm-stdlib.h
mv stdlib.wasm target/