I've tried several ways to build gambit with test coverage. 

Gcc has problems with compiling gambit-generated C code with test coverage and profiling arcs; the PR is here:

So I tried LLVM on Mac OS X. Things got stuck compiling _t-univ.scm (at least, I ran out of patience). 

Which led me to wonder: can Gambit be configured not to incorporate _t-univ.scm?  I don't think I ever use or need it, and it's the biggest thing in gsc/. 

Brad