Emacs-25.2 configuration problems

[Richard Melville]

I'm building a system without X windows.  I've already built and installed
ImageMagick-6.9.8-10 (avoiding ImageMagick-7) and most of the image
libraries, however, I still can't get Emacs to configure with ImageMagick
support.  It doesn't build with support for the image libraries either,
other than libjpeg.  Is this because I don't have the xorg libraries
instralled?  If so, this seems unreasonable.  Is there a way around it?

TIA

Richard