Add ifdefs and conditional compilation for LiteRT NPU components.

LiteRT-PiperOrigin-RevId: 820789660

Author: gcarranza-1

litert/c/BUILD

@@ -171,9 +171,13 @@ cc_library(
         ":litert_environment_options",
         "//litert/cc:litert_macros",
         "//litert/core:environment",
-        "//litert/runtime/accelerators:auto_registration",
         "@com_google_absl//absl/types:span",
     ] + select({
+        "//litert/build_common:build_include_npu_enabled": [
+            "//litert/runtime/accelerators:auto_registration",
+        ],
+        "//conditions:default": [],
+    }) + select({
         "//litert/build_common:build_include_gpu_enabled": [
             "//litert/runtime:gpu_environment",
         ],

litert/c/litert_environment.cc

@@ -23,7 +23,9 @@
 #include "litert/c/litert_environment_options.h"
 #include "litert/cc/litert_macros.h"
 #include "litert/core/environment.h"
+#if !defined(LITERT_DISABLE_NPU)
 #include "litert/runtime/accelerators/auto_registration.h"
+#endif  // !defined(LITERT_DISABLE_NPU)
 #if !defined(LITERT_DISABLE_GPU)
 #include "litert/runtime/gpu_environment.h"
 #endif  // !defined(LITERT_DISABLE_GPU)
@@ -41,7 +43,9 @@ LiteRtStatus LiteRtCreateEnvironment(int num_options,
   auto options_span = absl::MakeSpan(options, num_options);
   LITERT_ASSIGN_OR_RETURN(auto env,
                           LiteRtEnvironmentT::CreateWithOptions(options_span));
+  #if !defined(LITERT_DISABLE_NPU)
   litert::TriggerAcceleratorAutomaticRegistration(*env);
+  #endif  // !defined(LITERT_DISABLE_NPU)
 
   // Check if any GPU-related options are present using modern C++ algorithms
   constexpr std::array<LiteRtEnvOptionTag, 7> kGpuOptionTags = {

litert/runtime/BUILD

@@ -442,7 +442,6 @@ cc_library(
         "//litert/cc:litert_macros",
         "//litert/cc:litert_opaque_options",
         "//litert/cc/internal:litert_tensor_buffer_utils",
-        "//litert/compiler/plugin:compiler_plugin",
         "//litert/core:buffer_error_reporter",
         "//litert/core:build_stamp",
         "//litert/core:environment",
@@ -474,6 +473,7 @@ cc_library(
         "@com_google_absl//absl/types:span",
     ] + select({
         "//litert/build_common:build_include_npu_enabled": [
+            "//litert/compiler/plugin:compiler_plugin",
             "//litert/core/cache:compilation_cache",
             "//litert/core/model:model_serialize",
         ],

litert/runtime/compiled_model.cc

@@ -61,12 +61,12 @@
 #include "litert/cc/litert_handle.h"
 #include "litert/cc/litert_macros.h"
 #include "litert/cc/litert_opaque_options.h"
-#include "litert/compiler/plugin/compiler_plugin.h"
 #include "litert/core/buffer_error_reporter.h"
 #include "litert/core/build_stamp.h"
 #include "litert/core/error_reporter.h"
 #include "litert/core/model/model.h"
 #if !defined(LITERT_DISABLE_NPU)
+#include "litert/compiler/plugin/compiler_plugin.h"
 #include "litert/core/cache/compilation_cache.h"
 #include "litert/core/model/model_serialize.h"
 #endif  // !defined(LITERT_DISABLE_NPU)