livecode/util/emscripten-javascriptify.py at develop · livecode/livecode · GitHub

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#!/usr/bin/env python

# This script runs the command that converts the LLVM bitcode files

# produced by the emscripten compiler to JavaScript.

import sys

import os

import subprocess

# Compiler settings

# -----------------

# These should generally match the settings in config/emscripten-settings.gypi

settings = {

'ALLOW_MEMORY_GROWTH': 1,

'ASSERTIONS': 1,

'DEMANGLE_SUPPORT': 1,

'EMTERPRETIFY': 1,

'EMTERPRETIFY_ASYNC': 1,

'LINKABLE': 1,

'RESERVED_FUNCTION_POINTERS': 1024,

'TOTAL_MEMORY': 67108864,

'WARN_ON_UNDEFINED_SYMBOLS': 1,

}

# Get the build type and the compiler command

# -------------------------------------------

env_verbose = os.getenv('V', '0')

env_emcc = os.getenv('EMCC', 'emcc')

env_build_type = os.getenv('BUILDTYPE', 'Debug')

env_cflags = os.getenv('CFLAGS', [])

if env_build_type == 'Release':

optimisation_flags = ['-Os', '-g0']

else:

optimisation_flags = ['-O2', '-g3']

# Separate out separate elements of command line

emcc = env_emcc.split()

cflags = env_cflags.split()

# Process command line options

# ----------------------------

# Each option absorbs all subsequent arguments up to the next option.

# Options are identified by the fact they start with "--".

option = None

options = {}

for arg in sys.argv[1:]:

if arg.startswith('--'):

option = arg[2:]

options[option] = []

else:

if option is None:

print('ERROR: unrecognized option \'{}\''.format(arg))

sys.exit(1)

options[option].append(arg)

# Special handling for "--whitelist"

if options.has_key('whitelist'):

settings['EMTERPRETIFY_WHITELIST'] = '@{}'.format(options['whitelist'][0])

# Construct emcc command line

# ---------------------------

command = emcc + ["--emrun"] + optimisation_flags + cflags

for input in options['input']:

command.append(input)

command += ['-o', options['output'][0]]

for setting in sorted(settings.keys()):

command += ['-s', '{}={}'.format(setting, settings[setting])]

for option in ['pre-js', 'shell-file', 'js-library']:

if options.has_key(option):

for value in options[option]:

command += ['--' + option, value]

# Run emcc

# --------

if env_verbose.strip() is not '0':

print(" ".join(command))

emcc_result = subprocess.call(command)

sys.exit(emcc_result)

livecode/util/emscripten-javascriptify.py at develop · livecode/livecode · GitHub

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