Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.
To determine why ImageMagick failed to validate the WMF delegate library, look at config.log. Correct the problem its complaining about and rerun the configure script until the delegate library is validated.
The reason why libwmf failed to validate is in the config.log file. You just did not review it carefully enough. There is another section in the log dealing with libwmf other than the portion you posted. Look there to find your answer.