ibtool: link: cannot find the library `/usr/lib/libidn.la'
I have forced the install of libidn and libidn-devel, and still nothing.
What you mean by force install? Did you check for any dependencies?
Anyway make sure that:
1. the library exists in the above path
2. /usr/lib is in /etc/ld.so.conf and run "ldconfig" as root
3. /usr/lib is in your PKG_CONFIG_PATH
You can also create a symlink from the actual place of libidn.la to /us/lib
Hope that helps.