ROOT version: v5.20.00
Platform: 64 bit Linux Fedora Core 4
gcc version: gcc (GCC) 4.0.2 20051125 (Red Hat 4.0.2-8)
gfortran version: GNU Fortran 95 (GCC 4.0.2 20051125 (Red Hat 4.0.2-8))
It looks like this may be because versions of gfortran prior to 4.2
do not support the LOC command, which appears on lines 4216 and 4223
of misc/minicern/src/kernlib.f.
For reference, see the following email thread and bug report.