I've been trying to build the latest versions of Guitarix - both the git latest version (29 I believe) as the 28-2 - and both yield the same error when I try to use the -optimization flag

package libcloog-ppl0 not found          : optimization is disabled 

I'm using an Arch Linux on an Intel Atom N2800 and I have the AUR cloog-ppl 0.16.1-1 package installed. 

Is there something else to be done in order to get the optimization flag to work? Iǘe browsed the LAD archives and noticed there is already a tread with this error in topic for version 27.

Can I discard the optimization flag and add the "march=native" instead? If yes, how should I do it?

Can't wait to try the gx-fuzz on the MOD!

Kind regards and congratulations for the effort on Guitarix. Here at the MOD Team we have it as on of our favourite plugins pack.

Gianfranco