(Trying to switch to add to
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=64756.)
this doesn't work on systems that wrap `autom4te`.
Had no idea anyone did that.
grep: /Autom4te/FileUtils.pm: No such file or directory
Oops.
seems like the only reliable option is to invoke autom4te.
If you can complete the patch ...
FWIW, I know that "version" (development sources)
autoconf (GNU Autoconf) 2.72c.24-8e728
has the fix, because that's what I've been using.
I guess checking for 2.72d and later would suffice, though,
since that release is more or less imminent. --thanks, karl.
