IRRToolSet 5.1.2 released , error: possibly undefined macro:

[Nick Hilliard (INEX)]

James W. Laferriere wrote on 15/10/2019 22:32:
>      Just to show that libtool is installed ...
> jiml at ns4:/home/archive/irrtoolset-release-5.1.2$ dir 
> /usr/share/aclocal/ltdl.m4
> 32 -rw-r--r-- 1 root root 30030 Mar  7  2018 /usr/share/aclocal/ltdl.m4
> 
>      Also fyi ,  autoconf -vfi gives ...
> "autoconf: error: invalid option `-vfi'
> Try `autoconf --help' for more information."

what platform is this?

Nick