v1.7 fails due to gfortran version issue

[rwhetten]

I installed v1.7 from the repo 10 days ago, and completed the Jellyfish kmer-counting phase, but the runHawk script failed at the Eigenstrat smartpca step with error while loading shared libraries: libgsl.so.0: cannot open shared object file: No such file or directory. Making a symbolic link from libgsl.so.0 pointing to libgsl.so.27.0.0 avoids that error, but then the smartpca step fails with error while loading shared libraries: libgfortran.so.3: cannot open shared object file: No such file or directory. A symbolic link from libgfortran.so.3 pointing to libgfortran.so.5.0.0 avoids that error, but instead gives version 'GFORTRAN_1.0' not found (required by /mnt/cc02/software/HAWK/supplements/EIG6.0.1-Hawk/bin/smartpca). Is it possible to re-compile the modified Eigenstrat code with a more recent version of gfortran, or is there a better way to overcome this error?