I will be building R for the repo, but would need a fortran compiler for that.
From the R FAQ: "Note that you need a FORTRAN compiler or perhaps f2c in addition to a C compiler to build R."
Now, what exactly is the best or fastest or smallest compiler, I have no clue. Anyone willing to compile one of these?
(I remember one in the 5.8 repo, but don't remember what it was).