message: Honor compiler wrappers building Zlib.
diff: @@ -254,7 +254,7 @@ def configure(cxx_toolkit = None,
  zlib_configure_call = None
  zlib_configure_args = ['--static']
  else:
  - zlib_env['CC'] = cxx_toolkit.c
  + zlib_env['CC'] = ' '.join(cxx_toolkit.command_c)
  zlib_env['CFLAGS'] = '-fPIC -w'
  zlib_makefile = None
  zlib_configure_call = zlib_configure
  