Function run_binaryen_command

tools/building.py:1243–1281

(tool, infile, outfile=None, args=None, debug=False, stdout=None)

def run_binaryen_command(tool, infile, outfile=None, args=None, debug=False, stdout=None):
  cmd = [os.path.join(get_binaryen_bin(), tool)]
  if args:
    cmd += args
  if infile:
    cmd += [infile]
  if outfile:
    cmd += ['-o', outfile]
    if settings.ERROR_ON_WASM_CHANGES_AFTER_LINK:
      # emit some extra helpful text for common issues
      extra = ''
      # a plain -O0 build *almost* doesn't need post-link changes, except for
      # legalization. show a clear error for those (as the flags the user passed
      # in are not enough to see what went wrong)
      if settings.LEGALIZE_JS_FFI:
        extra += '\nnote: to disable int64 legalization (which requires changes after link) use -sWASM_BIGINT'
      if settings.OPT_LEVEL > 1:
        extra += '\nnote: -O2+ optimizations always require changes, build with -O0 or -O1 instead'
      exit_with_error(f'changes to the wasm are required after link, but disallowed by ERROR_ON_WASM_CHANGES_AFTER_LINK: {cmd}{extra}')
  if debug:
    cmd += ['-g'] # preserve the debug info
  # if the features are not already handled, handle them
  cmd += get_binaryen_feature_flags()
  # if we are emitting a source map, every time we load and save the wasm
  # we must tell binaryen to update it
  # TODO: all tools should support source maps; wasm-ctor-eval does not atm,
  #       for example
  if settings.GENERATE_SOURCE_MAP and outfile and tool in {'wasm-opt', 'wasm-emscripten-finalize', 'wasm-metadce'}:
    cmd += [f'--input-source-map={infile}.map']
    cmd += [f'--output-source-map={outfile}.map']
  if shared.SKIP_SUBPROCS:
    shared.print_compiler_stage(cmd)
    return ''
  ret = check_call(cmd, stdout=stdout).stdout
  if outfile:
    save_intermediate(outfile, '%s.wasm' % tool)
    global binaryen_kept_debug_info
    binaryen_kept_debug_info = '-g' in cmd
  return ret


def run_wasm_opt(infile, outfile=None, args=[], **kwargs):  # noqa