First: Yep, there's not much available about compiling gfortran for osx. The link does show an example of gfortran requiring glibc - which is the point you were disagreeing with.

Second: just another example (by descending order of googleableness) of the main gcc requiring glibc.

Quite possibly there is an osx (or other bsd) specific c library that can substitute for glibc, but I did not find it, and gfortran will complain without it.

'what is it that makes you think using glibc would solve a glibc problem?' Eh? I used glibc to solve a 'missing glibc' problem. I then had other problems with glibc which I attempted to solve.