gimp2 @2.8.22_1 -help_browser +remote +x11 +no_quartz: does not find automake-1.16

[majoc-at-astro (majoc-at-astro)]

The build of gimp2 is failing inside autogen.sh. Logfile to be appended, but here's the top bits:

:debug:main automake 1.16.1_0 exists in the ports tree
:debug:main automake 1.16.1_0  is the latest installed
:debug:main automake 1.16.1_0  is active

[snip]

:info:configure -n checking for autoconf >= 2.54 ... 
:info:configure yes (version 2.69)
:info:configure -n checking for automake >= 1.10.0 ... 
:info:configure   You must have automake 1.10.0 or newer installed to compile GNU Image Manipulation Program.
:info:configure   Download the appropriate package for your distribution,
:info:configure   or get the source tarball at ftp://ftp.gnu.org/pub/gnu/automake/
:info:configure ./autogen.sh: line 189: automake-1.11: command not found
:info:configure Major version might be too new (1.10.0)

For context, this is the same basic problem as with libsecret:

​https://trac.macports.org/ticket/56116

I enclose a patchfile for autogen.sh (untested) to show the fundamental problem, and as a first draft at a fix. Apologies if it's with respect to the wrong directory.