From a5fe6467f4591dd893d077e43ff9947b9a7a5244 Mon Sep 17 00:00:00 2001
From: Chris Thompson <chrismthompson@meta.com>
Date: Fri, 22 Aug 2025 15:55:27 -0700
Subject: [PATCH] Event Tracer Constraint (#13521)

Summary:

BUCK configs are not supported in some projects. This adds a constraint for enabling the event tracer.

Reviewed By: lucylq

Differential Revision: D80543370
---
 runtime/core/targets.bzl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/runtime/core/targets.bzl b/runtime/core/targets.bzl
index efc7853f3c1..e8240135a69 100644
--- a/runtime/core/targets.bzl
+++ b/runtime/core/targets.bzl
@@ -7,6 +7,11 @@ def get_event_tracer_flags():
     event_tracer_flags = []
     if event_tracer_enabled():
         event_tracer_flags += ["-DET_EVENT_TRACER_ENABLED"]
+    elif not runtime.is_oss:
+        event_tracer_flags += select ({
+            "DEFAULT": [],
+            "fbsource//xplat/executorch/tools/buck/constraints:event-tracer-enabled" : ["-DET_EVENT_TRACER_ENABLED"]
+        })
     return event_tracer_flags
 
 def build_sdk():