Ah, that's interesting. Actually, the "DRI driver" I meant was the
'i915_dri.so' file, which got created from these components:

- libdricommon.a
- libmesagallium.a
- libgallium.a
- libdridrm.a
- libi915drm.a
- libwsw.a
- libsoftpipe.a
- libgalahad.a
- libtrace.a
- librbug.a
- libi915.a

The Makefile for this library is located in src/gallium/targets/dri-i915.

But you're right, there also apppeared a 'mesa_dri_drivers.so' in the build
log, which doesn't appear anymore with your four patches applied. I also
remember having seen an 'i915_dri.so' file linked to 'mesa_dri_drivers.so' with
another configuration.

So, there appear to be two ways to get this 'i915_dri.so' file built and one of
them is actually a Gallium driver? I'm confused now.