Created attachment 211795 [details] ImageMagick6-nox11's patch file. I found a dependency on X11 in graphics/ImageMagick6-nox11. I confirmed that it is not in ImageMagick7-nox11. So I propose to reduce a differential from two Makefile.
A commit references this bug: Author: kwm Date: Sun Apr 19 17:51:35 UTC 2020 New revision: 532140 URL: https://svnweb.freebsd.org/changeset/ports/532140 Log: Update ImageMagick7 to 7.0.10-6 - Fix library name in bin/Magick*-config scripts. [1] - Reduce nox11 diff with the Imagemagick 6 version. PR: 245557 [1], 244275 [2] Reported by: VVD (vvd@unislabs.com) [1] nork@ninth-nine.com [2] Changes: head/graphics/ImageMagick7/Makefile head/graphics/ImageMagick7/distinfo head/graphics/ImageMagick7/pkg-plist