I just downloaded the source, tried to compile, got some errors running make, but fixed them and figured I should report it somewhere to the project.  I'm on a PPC Mac running OS X 10.4 and was getting an error regarding time_t in progress.h, which is included from list.c.  After I added #include <time.h> in progress.h, gocr compiled and I was able to run it.  Sorry if this is known or if I've posted in the wrong place, but I thought maybe this could help someone.