My bad. Sorry, don't know why I didn't remember, but once I got home and on my programming system, I pulled up my notes. I couldn't get Tk-804.027 installed on Mountain Lion, either. Lots of make errors.
I downloaded Tk-804.030 and that worked. I also have a note that make failed with a different error the first time, but when I issued a "make clean" then started the process again, it completed. Make test, didn't work for some reason I didn't log, but Tk has been working fine with Perlbrew on both a Pro and an Air. (Both with ML)