code: def configuration(parent_package="", top_path=None):
      config = Configuration("manifold", parent_package, top_path)
      libraries = []
      if os.name == "posix":
          libraries.append("m")
      config.add_extension(
          "_utils",
          sources=["_utils.pyx"],
          include_dirs=[numpy.get_include()],
          libraries=libraries,
          extra_compile_args=["-O3"],
      )
      cblas_libs, blas_info = get_blas_info()
      eca = blas_info.pop("extra_compile_args", [])
      eca.append("-O4")
      config.add_extension(
          "_barnes_hut_tsne",
          libraries=cblas_libs,
          sources=["_barnes_hut_tsne.pyx"],
          include_dirs=[
              join("..", "src", "cblas"),
              numpy.get_include(),
              blas_info.pop("include_dirs", []),
          ],
          extra_compile_args=eca,
          **blas_info,
      )
  
      config.add_subpackage("tests")
  
      return config
  
imports: import os
  from os.path import join
  import numpy
  from numpy.distutils.misc_util import Configuration
  from sklearn._build_utils import get_blas_info
label_desc: Use image node_id 1 for calling a global function with example usage: configuration(parent_package, top_path) and returns: config