message: Disable signed-compare warnings in TensorFlow default build.
  We have a lot of such warnings and don't make an attempt to clean them up
  internally.
diff: @@ -497,7 +497,7 @@ def set_cc_opt_flags(environ_cp):
  elif is_windows():
  default_cc_opt_flags = '/arch:AVX'
  else:
  - default_cc_opt_flags = '-march=native'
  + default_cc_opt_flags = '-march=native -Wno-sign-compare'
  question = ('Please specify optimization flags to use during compilation when'
  ' bazel option "--config=opt" is specified [Default is %s]: '
  ) % default_cc_opt_flags
  