[R-sig-dyn-mod] compilation failed for package ‘rootSolve’

[RC Phelps]

Hi, I'm trying to test drive the simecolModels (specifically aquaphy) and I
can't get rootSolve to compile during

> install.packages("simecolModels", repos="http://R-Forge.R-project.org")

the error is

gfortran-4.8: warning: couldn’t understand kern.osversion ‘15.6.0
gfortran-4.8   -fPIC  -g -O2  -c dsparsk.f -o dsparsk.o
gfortran-4.8: warning: couldn’t understand kern.osversion ‘15.6.0
f951: internal compiler error: Illegal instruction: 4

f951: internal compiler error: Abort trap: 6
gfortran-4.8: internal compiler error: Abort trap: 6 (program f951)
make: *** [dsparsk.o] Abort trap: 6
ERROR: compilation failed for package ‘rootSolve’

per
https://stackoverflow.com/questions/37753941/os-x-package-installation-issue-cant-find-gfortran-4-8-to-build-package

I updated my ~/.R/Makevars ; tried again, and get the same error. Any ideas?

console traffic and Makevars attached. I'm on OSX 10.11.6 with R 3.3.3

Thank you.

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