[clang] [compiler-rt] [rtsan] Enable RealtimeSanitizer for FreeBSD (PR #125389)

[Chris Apple via cfe-commits]

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@@ -1539,6 +1543,7 @@ TEST_F(KqueueTest, KeventDiesWhenRealtime) {
   ExpectNonRealtimeSurvival(Func);
 }
 
+#if SANITIZER_APPLE
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cjappl wrote:

"Kqueue is a scalable event notification interface introduced in FreeBSD 4.1 in July 2000, also supported in NetBSD, OpenBSD, DragonFly BSD, and macOS."

Perhaps we just want `!FREE_BSD` or similar. Also I would potentially un-nest these `ifdefs` for clarity

https://github.com/llvm/llvm-project/pull/125389