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emscripten-javascriptify.sh

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#!/bin/bash

# This script runs the command that javascript-ifies the bitcode files produced

# by the Emscripten compiler.

set -e

# Parameters:

# input: bitcode file to javascriptify

# output: the output HTML file

# exports: JSON file containing list of exported functions

# whitelist: JSON file containing list of emterpreted functions

# other args: additional javascript libraries to include

input=$1

output=$2

html_template=$3

whitelist=$4

preamble=$5

shift 5

for lib in $@ ; do

libs+=\ --js-library\ "${lib}"

done

EMCC=${EMCC:-emcc}

BUILDTYPE=${BUILDTYPE:-Debug}

# Optimisation flags for the Emscripten bitcode-to-javascript step:

# -Os Optimise for a balance of size and speed

if [ "${BUILDTYPE}" = "Release" ] ; then

optimisation_flags="-Os -g0"

else

optimisation_flags="-O2 -g3"

${EMCC} ${optimisation_flags} ${CFLAGS} \

"${input}" \

-o "${output}" \

--shell-file "${html_template}" \

-s EMTERPRETIFY_WHITELIST=@"${whitelist}" \

-s ASSERTIONS=1 \

-s EMTERPRETIFY=1 \

-s EMTERPRETIFY_ASYNC=1 \

-s ALLOW_MEMORY_GROWTH=1 \

-s TOTAL_MEMORY=67108864 \

--pre-js "${preamble}" \

${libs}