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128 lines
4.0 KiB
Python
128 lines
4.0 KiB
Python
import os
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import string
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import sys
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def is_active():
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return True
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def get_name():
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return "JavaScript"
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def can_build():
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return ("EMSCRIPTEN_ROOT" in os.environ or "EMSCRIPTEN" in os.environ)
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def get_opts():
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from SCons.Variables import BoolVariable
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return [
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BoolVariable('javascript_eval', 'Enable JavaScript eval interface', True),
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]
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def get_flags():
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return [
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('tools', False),
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('module_theora_enabled', False),
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# Disabling the mbedtls module reduces file size.
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# The module has little use due to the limited networking functionality
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# in this platform. For the available networking methods, the browser
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# manages TLS.
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('module_mbedtls_enabled', False),
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]
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def create(env):
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# remove Windows' .exe suffix
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return env.Clone(tools=['textfile', 'zip'], PROGSUFFIX='')
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def escape_sources_backslashes(target, source, env, for_signature):
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return [path.replace('\\','\\\\') for path in env.GetBuildPath(source)]
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def escape_target_backslashes(target, source, env, for_signature):
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return env.GetBuildPath(target[0]).replace('\\','\\\\')
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def configure(env):
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## Build type
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if (env["target"] == "release"):
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# Use -Os to prioritize optimizing for reduced file size. This is
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# particularly valuable for the web platform because it directly
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# decreases download time.
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# -Os reduces file size by around 5 MiB over -O3. -Oz only saves about
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# 100 KiB over -Os, which does not justify the negative impact on
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# run-time performance.
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env.Append(CCFLAGS=['-Os'])
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env.Append(LINKFLAGS=['-Os'])
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elif (env["target"] == "release_debug"):
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env.Append(CCFLAGS=['-O2', '-DDEBUG_ENABLED'])
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env.Append(LINKFLAGS=['-O2'])
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# retain function names at the cost of file size, for backtraces and profiling
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env.Append(LINKFLAGS=['--profiling-funcs'])
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elif (env["target"] == "debug"):
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env.Append(CCFLAGS=['-O1', '-D_DEBUG', '-g', '-DDEBUG_ENABLED'])
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env.Append(LINKFLAGS=['-O1', '-g'])
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env.Append(LINKFLAGS=['-s', 'ASSERTIONS=1'])
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## Compiler configuration
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env['ENV'] = os.environ
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if ("EMSCRIPTEN_ROOT" in os.environ):
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env.PrependENVPath('PATH', os.environ['EMSCRIPTEN_ROOT'])
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elif ("EMSCRIPTEN" in os.environ):
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env.PrependENVPath('PATH', os.environ['EMSCRIPTEN'])
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env['CC'] = 'emcc'
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env['CXX'] = 'em++'
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env['LINK'] = 'emcc'
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env['RANLIB'] = 'emranlib'
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# Emscripten's ar has issues with duplicate file names, so use cc
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env['AR'] = 'emcc'
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env['ARFLAGS'] = '-o'
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if (os.name == 'nt'):
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# use TempFileMunge on Windows since some commands get too long for
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# cmd.exe even with spawn_fix
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# need to escape backslashes for this
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env['ESCAPED_SOURCES'] = escape_sources_backslashes
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env['ESCAPED_TARGET'] = escape_target_backslashes
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env['ARCOM'] = '${TEMPFILE("%s")}' % env['ARCOM'].replace('$SOURCES', '$ESCAPED_SOURCES').replace('$TARGET', '$ESCAPED_TARGET')
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env['OBJSUFFIX'] = '.bc'
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env['LIBSUFFIX'] = '.bc'
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## Compile flags
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env.Append(CPPPATH=['#platform/javascript'])
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env.Append(CPPFLAGS=['-DJAVASCRIPT_ENABLED', '-DUNIX_ENABLED', '-DPTHREAD_NO_RENAME', '-DTYPED_METHOD_BIND', '-DNO_THREADS'])
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env.Append(CPPFLAGS=['-DGLES3_ENABLED'])
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# These flags help keep the file size down
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env.Append(CPPFLAGS=["-fno-exceptions", '-DNO_SAFE_CAST', '-fno-rtti'])
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if env['javascript_eval']:
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env.Append(CPPFLAGS=['-DJAVASCRIPT_EVAL_ENABLED'])
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## Link flags
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env.Append(LINKFLAGS=['-s', 'BINARYEN=1'])
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env.Append(LINKFLAGS=['-s', 'ALLOW_MEMORY_GROWTH=1'])
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env.Append(LINKFLAGS=['-s', 'USE_WEBGL2=1'])
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env.Append(LINKFLAGS=['-s', 'EXTRA_EXPORTED_RUNTIME_METHODS="[\'FS\']"'])
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env.Append(LINKFLAGS=['-s', 'INVOKE_RUN=0'])
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env.Append(LINKFLAGS=['-s', 'NO_EXIT_RUNTIME=1'])
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# TODO: Move that to opus module's config
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if 'module_opus_enabled' in env and env['module_opus_enabled']:
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env.opus_fixed_point = "yes"
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