intel: Add meson option -Dintel-elk

Defaults to true.  When set to false Iris and various tools can be
built without ELK support.  In both cases this means supporting
only Gfx9+.  This option must be true to build Crocus or Hasvk.

This allows skipping re-building ELK when developing for newer platforms
with tools/tests enabled.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/11575
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33054>

src/intel/tools/intel_tools.c

@@ -7,10 +7,20 @@
 
 #include "compiler/brw_disasm.h"
 #include "compiler/brw_isa_info.h"
+#ifdef INTEL_USE_ELK
 #include "compiler/elk/elk_disasm.h"
 #include "compiler/elk/elk_isa_info.h"
+#endif
 #include "dev/intel_device_info.h"
 
+static void
+not_supported(const struct intel_device_info *devinfo)
+{
+   fprintf(stderr, "ERROR: Tool compiled without support for Gfx version %d.\n",
+           devinfo->ver);
+   exit(EXIT_FAILURE);
+}
+
 void
 intel_disassemble(const struct intel_device_info *devinfo,
                   const void *assembly, int start, FILE *out)
@@ -20,9 +30,13 @@ intel_disassemble(const struct intel_device_info *devinfo,
          brw_init_isa_info(&isa, devinfo);
          brw_disassemble_with_errors(&isa, assembly, start, out);
       } else {
+#ifdef INTEL_USE_ELK
          struct elk_isa_info isa;
          elk_init_isa_info(&isa, devinfo);
          elk_disassemble_with_errors(&isa, assembly, start, out);
+#else
+         not_supported(devinfo);
+#endif
       }
 }
 
@@ -41,9 +55,13 @@ intel_decoder_init(struct intel_batch_decode_ctx *ctx,
       intel_batch_decode_ctx_init_brw(ctx, &isa, devinfo, fp,
                                       flags, xml_path, get_bo, get_state_size, user_data);
    } else {
+#ifdef INTEL_USE_ELK
       struct elk_isa_info isa;
       elk_init_isa_info(&isa, devinfo);
       intel_batch_decode_ctx_init_elk(ctx, &isa, devinfo, fp,
                                       flags, xml_path, get_bo, get_state_size, user_data);
+#else
+      not_supported(devinfo);
+#endif
    }
 }

src/intel/tools/meson.build

@@ -21,7 +21,7 @@ libintel_tools = static_library(
     idep_libintel_common,
   ],
   include_directories : [inc_include, inc_src, inc_intel],
-  c_args : [no_override_init_args],
+  c_args : [intel_common_args, no_override_init_args],
   gnu_symbol_visibility : 'hidden',
   install : false,
 )