This directory contains a precompiled version of Lens that runs under Linux on
x86-based machines.  Here is what you have to do to be able to run the
binaries (lens and alens). [This assumes you use the default "bash" shell and
that your Lens folder is at ~/Lens - if it's elsewhere, change the commands
below accordingly (and ask for specific help if necessary).]

1) Check the HOSTTYPE variable (by running "echo $HOSTTYPE") in a
shell/terminal.  If it reports "x86_64" (64-bit machine), you're good to go.
If echo reports "HOSTTYPE: Undefined variable", then you'll need to set
HOSTTYPE as an environment variable (see below).

2) Add the following lines to ~/.bashrc (there's no need to add the HOSTTYPE
line if it was already set to x86_64 in Step 1):

   export LENSDIR=~/Lens
   export HOSTTYPE=x86_64
   export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$LENSDIR/Bin/$HOSTTYPE
   export PATH=$PATH:$LENSDIR/Bin/$HOSTTYPE

3) Exit your shell/terminal and restart another one.  You should now be able
to run lens by typing "lens" or "alens" at the shell prompt.

An offline version of the Lens manual can be read by pointing your browser at
$LENSDIR/Manual/index.html. 

David Plaut
plaut@cmu.edu
17 Jan 2024