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import os
import string
import sys
def is_active():
return True
def get_name():
return "JavaScript"
def can_build():
return ("EMSCRIPTEN_ROOT" in os.environ or "EMSCRIPTEN" in os.environ)
def get_opts():
from SCons.Variables import BoolVariable
return [
BoolVariable('wasm', 'Compile to WebAssembly', False),
BoolVariable('javascript_eval', 'Enable JavaScript eval interface', True),
]
def get_flags():
return [
('tools', False),
('module_theora_enabled', False),
]
def create(env):
# remove Windows' .exe suffix
return env.Clone(tools=['textfile', 'zip'], PROGSUFFIX='')
def escape_sources_backslashes(target, source, env, for_signature):
return [path.replace('\\','\\\\') for path in env.GetBuildPath(source)]
def escape_target_backslashes(target, source, env, for_signature):
return env.GetBuildPath(target[0]).replace('\\','\\\\')
def configure(env):
## Build type
if (env["target"] == "release"):
env.Append(CCFLAGS=['-O3'])
env.Append(LINKFLAGS=['-O3'])
elif (env["target"] == "release_debug"):
env.Append(CCFLAGS=['-O2', '-DDEBUG_ENABLED'])
env.Append(LINKFLAGS=['-O2', '-s', 'ASSERTIONS=1'])
# retain function names at the cost of file size, for backtraces and profiling
env.Append(LINKFLAGS=['--profiling-funcs'])
elif (env["target"] == "debug"):
env.Append(CCFLAGS=['-O1', '-D_DEBUG', '-g', '-DDEBUG_ENABLED'])
env.Append(LINKFLAGS=['-O1', '-g'])
## Compiler configuration
env['ENV'] = os.environ
if ("EMSCRIPTEN_ROOT" in os.environ):
env.PrependENVPath('PATH', os.environ['EMSCRIPTEN_ROOT'])
elif ("EMSCRIPTEN" in os.environ):
env.PrependENVPath('PATH', os.environ['EMSCRIPTEN'])
env['CC'] = 'emcc'
env['CXX'] = 'em++'
env['LINK'] = 'emcc'
env['RANLIB'] = 'emranlib'
# Emscripten's ar has issues with duplicate file names, so use cc
env['AR'] = 'emcc'
env['ARFLAGS'] = '-o'
if (os.name == 'nt'):
# use TempFileMunge on Windows since some commands get too long for
# cmd.exe even with spawn_fix
# need to escape backslashes for this
env['ESCAPED_SOURCES'] = escape_sources_backslashes
env['ESCAPED_TARGET'] = escape_target_backslashes
env['ARCOM'] = '${TEMPFILE("%s")}' % env['ARCOM'].replace('$SOURCES', '$ESCAPED_SOURCES').replace('$TARGET', '$ESCAPED_TARGET')
env['OBJSUFFIX'] = '.bc'
env['LIBSUFFIX'] = '.bc'
## Compile flags
env.Append(CPPPATH=['#platform/javascript'])
env.Append(CPPFLAGS=['-DJAVASCRIPT_ENABLED', '-DUNIX_ENABLED', '-DPTHREAD_NO_RENAME', '-DTYPED_METHOD_BIND', '-DNO_THREADS'])
env.Append(CPPFLAGS=['-DGLES3_ENABLED'])
# These flags help keep the file size down
env.Append(CPPFLAGS=["-fno-exceptions", '-DNO_SAFE_CAST', '-fno-rtti'])
if env['javascript_eval']:
env.Append(CPPFLAGS=['-DJAVASCRIPT_EVAL_ENABLED'])
## Link flags
env.Append(LINKFLAGS=['-s', 'EXTRA_EXPORTED_RUNTIME_METHODS="[\'FS\']"'])
env.Append(LINKFLAGS=['-s', 'USE_WEBGL2=1'])
if env['wasm']:
env.Append(LINKFLAGS=['-s', 'BINARYEN=1'])
# In contrast to asm.js, enabling memory growth on WebAssembly has no
# major performance impact, and causes only a negligible increase in
# memory size.
env.Append(LINKFLAGS=['-s', 'ALLOW_MEMORY_GROWTH=1'])
env.extra_suffix = '.webassembly' + env.extra_suffix
else:
env.Append(LINKFLAGS=['-s', 'ASM_JS=1'])
env.Append(LINKFLAGS=['--separate-asm'])
env.Append(LINKFLAGS=['--memory-init-file', '1'])
# TODO: Move that to opus module's config
if 'module_opus_enabled' in env and env['module_opus_enabled']:
env.opus_fixed_point = "yes"
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