LT_PREREQ([2.4.2]) does not work with Libtool 2.4.2, although Libtool 2.4.2 manual says that it will.
Today I learned this useless nearly useless piece of arcana.
@graydon That is such an excellent analogy!
I was hoping to be done with fixing the build system in this old sprawling project in "maybe a couple of weeks" and never having to touch it again and forget it all for ever and... well, we all know how that goes. :-)
I am also seeing the silly error in that sentence for the first time now. I made sure I spelled "arcana" right, but missed repeated use of "useless". Brains are weird.
(Hi Graydon!)