i also have this problem yet i know i have ncurses installed, however i think i need ncurses-dev installed (which i cannot find on the discs or even on swaret etc). I've searched the slackware site and the web for ncurses-dev and it appears the only file i can get is the ncurses-dev RPM (which when i do rpm2tgz then installpkg, does not install any files).
this is odd as i have had slackware running (same cd's, same version etc) before with the full install and it worked fine, yet i decided to reinstall with a small system (no X etc) and make menuconfig now moans....
anyone give any tips? i beleive i would need to run ldconfig, which i have done (is that neccasary? as far as im aware it is), still no joy!