meson: add a new option to enable intel-clc without building RT shaders

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26797>

meson.build

@@ -295,14 +295,18 @@ with_any_broadcom = [
   with_broadcom_vk,
 ].contains(true)
 
-if ['x86_64'].contains(host_machine.cpu_family())
+if ['x86_64'].contains(host_machine.cpu_family()) and \
+   get_option('intel-clc') != 'system'
+  # Require intel-clc with Anv & Iris (for internal shaders)
   with_intel_clc = get_option('intel-clc') == 'enabled'
-  with_intel_vk_rt = with_intel_vk and get_option('intel-clc') != 'disabled'
 else
   with_intel_clc = false
-  with_intel_vk_rt = false
 endif
 
+with_intel_vk_rt = with_intel_vk and \
+                   get_option('intel-clc') != 'disabled' and \
+                   get_option('intel-rt') != 'disabled'
+
 with_any_intel = [
   with_gallium_crocus,
   with_gallium_i915,
@@ -601,7 +605,7 @@ _vdpau_drivers = [
 vdpau = get_option('gallium-vdpau') \
   .require(system_has_kms_drm, error_message : 'VDPAU state tracker can only be build on unix-like OSes.') \
   .require(with_platform_x11, error_message : 'VDPAU state tracker requires X11 support.') \
-  .require(_vdpau_drivers.contains(true), error_message : 'VDPAU state tracker requires at least one of the following gallium drivers: r600, radeonsi, nouveau, d3d12 (with option gallium-d3d12-video, virgl).') 
+  .require(_vdpau_drivers.contains(true), error_message : 'VDPAU state tracker requires at least one of the following gallium drivers: r600, radeonsi, nouveau, d3d12 (with option gallium-d3d12-video, virgl).')
 
 dep_vdpau = dependency('vdpau', version : '>= 1.1', required : vdpau)
 if dep_vdpau.found()
@@ -949,7 +953,7 @@ endif
 
 with_shader_cache = get_option('shader-cache') \
   .require(host_machine.system() != 'windows', error_message : 'Shader Cache does not currently work on Windows') \
-  .allowed() 
+  .allowed()
 
 if with_shader_cache
   pre_args += '-DENABLE_SHADER_CACHE'
@@ -1597,7 +1601,7 @@ use_xmlconfig = get_option('xmlconfig') \
   .require(dep_expat.found(),
            error_message : 'requires expat') \
   .allowed()
-  
+
 # Predefined macros for windows
 if host_machine.system() == 'windows'
   pre_args += '-DWIN32_LEAN_AND_MEAN' # http://msdn2.microsoft.com/en-us/library/6dwk3a1z.aspx

meson_options.txt

@@ -639,8 +639,18 @@ option(
   choices : [
     'enabled', 'disabled', 'system',
   ],
-  description : 'Build the intel-clc compiler (enables Vulkan Intel ' +
+  description : 'Build the intel-clc compiler.'
-                'Ray Tracing on supported hardware).'
+)
+
+option(
+  'intel-rt',
+  type : 'combo',
+  deprecated: {'true': 'enabled', 'false': 'disabled'},
+  value : 'disabled',
+  choices : [
+    'enabled', 'disabled',
+  ],
+  description : 'Build Ray Tracing on supported hardware.'
 )
 
 option(