message: Honor compiler wrappers building Boost.
diff: @@ -978,7 +978,7 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
  @property
  def params(self):
  - cxx = self.__toolkit.cxx
  + cxx = ' '.join(self.__toolkit.command_cxx)
  linkflags = []
  if windows:
  extra = ': <target-os>windows '
  @@ -998,7 +998,6 @@ using python : %(python_version)s : %(python_prefix)s/%(python_bin)s : %(python_
  compiler = 'clang'
  else:
  compiler = 'darwin'
  - cxx = cxx_toolkit.cxx
  elif cxx_toolkit.os is drake.os.ios:
  compiler = 'darwin'
  else:
  