Intel clc dependency

[Brian Paul]

I'm trying to build the Intel Vulkan driver.  First time in a few 
months.  I'm having build problems related to clc.  I'm on Ubuntu 22.04


[...]
[1347/3181] Generating src/intel/vulkan/...om command (wrapped by meson 
to set env)
FAILED: 
src/intel/vulkan/grl/gfx125_bvh_build_BFS_BFS_pass1_indexed_batchable.h
env MESA_SHADER_CACHE_DISABLE=true MESA_SPIRV_LOG_LEVEL=error 
/home/brianp/build3/mesa/build/src/intel/compiler/intel_clc -p dg2 
--prefix gfx125_bvh_build_BFS_BFS_pass1_indexed_batchable -e 
BFS_pass1_indexed_batchable --in 
../src/intel/vulkan/grl/gpu/bvh_build_BFS.cl --in 
/home/brianp/build3/mesa/src/intel/vulkan/grl/gpu/libs/lsc_intrinsics_fallback.cl 
-o 
src/intel/vulkan/grl/gfx125_bvh_build_BFS_BFS_pass1_indexed_batchable.h 
-- -cl-std=cl2.0 -D__OPENCL_VERSION__=200 -DMAX_HW_SIMD_WIDTH=16 
-DMAX_WORKGROUP_SIZE=16 
-I/home/brianp/build3/mesa/src/intel/vulkan/grl/gpu 
-I/home/brianp/build3/mesa/src/intel/vulkan/grl/include
ERROR: libclc shader missing. Consider installing the libclc package
Aborted (core dumped)

I've installed every clc-related package I could find.  I've tried 
several options for the 'intel-clc' option without luck.

BTW, the description of intel-clc in meson_options.txt looks suspect:

option(
   'intel-clc',
   type : 'combo',
   deprecated: {'true': 'enabled', 'false': 'disabled'},
   value : 'disabled',
   choices : [
     'enabled', 'disabled', 'system',
   ],
   description : 'Build the intel-clc compiler (enables Vulkan Intel ' +
                 'Ray Tracing on supported hardware).'
)

The default is 'disabled' but that's deprecated?  Choices include 
'enabled' but that's deprecated too?

Any tips for building the ToT Intel Vulkan driver?

-Brian

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