Dear XOtcl community,
there was a small glitch in 0.85p1. The modification date of predefined.xotcl was newer than the date of predefined.h due to a checkin in the version management system. Therefore "make" tried to rebuild predefined.h using the xotclsh from xotcl in the source tree. If the tar archive is freshly expanded, there is no xotclsh, therefor make stopped with an error message.
The simplest correction would have been "toch src/predefined.h".
I have fixed the tarfile of 0.85p1 on friday such it contains reasonable modification times...
sorry for the unconvenience -gustaf