From 9c08d2251845fd0e607b2c801074ebb419b87eba Mon Sep 17 00:00:00 2001
From: Stuart Montgomery <smontgomery@apple.com>
Date: Wed, 16 Apr 2025 20:31:34 -0500
Subject: [PATCH] Ensure the .whenEmbedded() build setting condition evaluates
 to false when building for non-Embedded without a fallback condition

---
 Package.swift | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Package.swift b/Package.swift
index 80e6ce797..2bd95be6a 100644
--- a/Package.swift
+++ b/Package.swift
@@ -239,8 +239,9 @@ extension BuildSettingCondition {
       if let nonEmbeddedCondition = nonEmbeddedCondition() {
         nonEmbeddedCondition
       } else {
-        // The caller did not supply a fallback.
-        .when(platforms: [])
+        // The caller did not supply a fallback. Specify a non-existent platform
+        // to ensure this condition never matches.
+        .when(platforms: [.custom("DoesNotExist")])
       }
     } else {
       // Enable unconditionally because the target is Embedded Swift.