OK, I figured there was something wrong with the SlackBuild scripting, but I'm not qualified to even guess what. But most likely, there isn't anything wrong, and the problem lies between the chair and the keyboard...
Anyway, out of curiosity, I reckoned the SlackBuild installation proecess had dealt with the original gsf/gio problem and created the necessary libraries, so I tried the original installation package from Abisource.
This time, ./configure, make and make install all ran OK, with no error messages.
I then tried to run abiword, for the first time, but got this message:
/usr/local/bin/abiword: error while loading shared libraries: libabiword-2.8.so: cannot open shared object file: No such file or directory
I then found this post
, relating to the problem.
But, where iamhimay writes "ln -sf /usr/lib/libabiword-2.8.so /lib/", Slackware 13 uses /usr/local/lib/
, so the path is /usr/local/lib/libabiword-2.8.so
So far, Abiword works OK, but I haven't fully tested it yet.