GNU Smalltalk version 2.95h (the latest release candidate) didn’t compile out-of-the-box on Mac OS X 10.3.9 for me. The two changes that were required were:
* change the header file includes in
to the older way of getting the prototypes for
* change part of a
to remove mention of the
After these changes, gst compiles and runs well for me on my OS X 10.3.9 box.