code: def _ctc_check_compile(ctc_lib_path):
      preambule = """
  #include <string.h>
  #include "ctc.h"
  """
  
      body = """
  ctcOptions options;
  memset(&options, 0, sizeof(ctcOptions));
  options.loc = CTC_CPU;
  options.num_threads = 1;
  """
  
      params = ["-I%s" % (os.path.dirname(__file__))]
      if ctc_lib_path is not None:
          params.extend(
              ["-I%s" % (os.path.join(config.ctc.root, "include"))]
          )
          params.extend(["-L%s" % (ctc_lib_path)])
      params.extend(["-l", "warpctc"])
      compiler_res = GCC_compiler.try_flags(
          params,
          preambule=preambule,
          body=body,
          try_run=False,
          output=True,
      )
  
      avail, out, err = (
          compiler_res
          if isinstance(compiler_res, tuple)
          else (compiler_res, None, None)
      )
      if not avail:
          return False, (
              "cannot compile with warp-ctc. "
              "We got this error:\n" + str(err)
          )
      return True, None
  
imports: from __future__ import division, absolute_import, print_function
  import os
  import sys
  import theano.tensor
  from theano import config
  from theano import gof
  from theano.gof import local_optimizer
  from theano.gof.cmodule import GCC_compiler
  from theano.tensor.opt import register_canonicalize
  from theano.tensor.extra_ops import cpu_contiguous
  from theano.gradient import grad_undefined
label_desc: Use image node_id 2 for calling a global function with example usage: _ctc_check_compile(ctc_lib_path) and returns: True,  None, False,  unknown