@Boken-Lin Thank you as your name is popping up all over the community with very good answers. I've tried to do as you suggested but not quite there yet. I'm trying to achieve the same here to install peel which seems to need the cross compile. I made it to the step make menuconfig and am able to set the initial options (Target system, subtarget, Target profile). Then it becomes unclear.

I've create the folder php5-pecl in the feeds directory. Inside I've created the Makefile.
But I can find the php5-pecl in the make menuconfig options.

Any tips or idea's ...?

@Josip-Mlakar Great tutorial works like a charm. It only seems that apache isn't autostarting after a boot. Any ways you have solved that one?