code: def main():
      """Entry-point to run Cython with custom options."""
      args = sys.argv[1:]
      if not args:
          appdir = os.path.dirname(os.path.abspath(__file__))
          topdir = os.path.dirname(appdir)
          source = os.path.join("src", "mpi4py", "MPI.pyx")
          target = os.path.join("src", "mpi4py", "MPI.c")
          args += ["--working", topdir]
          args += [source, "--output-file", target]
      sys.exit(cythonize(args))
  
imports: import os
  import sys
  from Cython.Compiler.Main import main
label_desc: Use image node_id 2 for calling a global function with example usage: main() without return types