Fix compiling ARPACK with gcc 10. * src/arpack-1-gcc10.patch: Cherry pick (part of) patch from upstream to (hopefully) fix compilation with gcc 10. * dist-files.mk: Add new file to list.

#!/bin/bash
## bootstrap script
## Run this to generate the configure script

set -e      # halt if unhandled error
aclocal
autoconf    # generate configure script