diff --git a/runtime/core/targets.bzl b/runtime/core/targets.bzl
index fe9edd5c8a2..4bbe58f322b 100644
--- a/runtime/core/targets.bzl
+++ b/runtime/core/targets.bzl
@@ -9,6 +9,15 @@ def get_event_tracer_flags():
         event_tracer_flags += ["-DET_EVENT_TRACER_ENABLED"]
     return event_tracer_flags
 
+def build_sdk():
+    return native.read_config("executorch", "build_sdk", "false") == "true"
+
+def get_sdk_flags():
+    sdk_flags = []
+    if build_sdk():
+        sdk_flags += ["-DEXECUTORCH_BUILD_SDK"]
+    return sdk_flags
+
 def define_common_targets():
     """Defines targets that should be shared between fbcode and xplat.
 
@@ -92,7 +101,7 @@ def define_common_targets():
                 "//executorch/...",
                 "@EXECUTORCH_CLIENTS",
             ],
-            exported_preprocessor_flags = get_event_tracer_flags(),
+            exported_preprocessor_flags = get_event_tracer_flags() + get_sdk_flags(),
             exported_deps = [
                 "//executorch/runtime/platform:platform",
                 "//executorch/runtime/core:evalue" + aten_suffix,
diff --git a/sdk/targets.bzl b/sdk/targets.bzl
new file mode 100644
index 00000000000..38c2e6e820e
--- /dev/null
+++ b/sdk/targets.bzl
@@ -0,0 +1,8 @@
+def build_sdk():
+    return native.read_config("executorch", "build_sdk", "false") == "true"
+
+def get_sdk_flags():
+    sdk_flags = []
+    if build_sdk():
+        sdk_flags += ["-DEXECUTORCH_BUILD_SDK"]
+    return sdk_flags