code: def configuration(parent_package="", top_path=None):
      from numpy.distutils.misc_util import Configuration
  
      config = Configuration("_lib", parent_package, top_path)
      config.add_data_files("tests/*.py")
  
      include_dir = os.path.abspath(
          os.path.join(os.path.dirname(__file__), "src")
      )
      depends = [os.path.join(include_dir, "ccallback.h")]
  
      config.add_extension(
          "_ccallback_c",
          sources=["_ccallback_c.c"],
          depends=depends,
          include_dirs=[include_dir],
      )
  
      config.add_extension(
          "_test_ccallback",
          sources=["src/_test_ccallback.c"],
          depends=depends,
          include_dirs=[include_dir],
      )
  
      config.add_extension("_fpumode", sources=["_fpumode.c"])
  
      def get_messagestream_config(ext, build_dir):
          # Generate a header file containing defines
          config_cmd = config.get_config_cmd()
          defines = []
          if config_cmd.check_func(
              "open_memstream", decl=True, call=True
          ):
              defines.append(("HAVE_OPEN_MEMSTREAM", "1"))
          target = os.path.join(
              os.path.dirname(__file__), "src", "messagestream_config.h"
          )
          with open(target, "w") as f:
              for name, value in defines:
                  f.write("#define {0} {1}\n".format(name, value))
  
      depends = [os.path.join(include_dir, "messagestream.h")]
      config.add_extension(
          "messagestream",
          sources=["messagestream.c"] + [get_messagestream_config],
          depends=depends,
          include_dirs=[include_dir],
      )
  
      return config
  
label_desc: Use image node_id 1 for calling a global function with example usage: configuration(parent_package, top_path) and returns: config