diff --git a/compiler-rt/test/tsan/libdispatch/async_and_wait.c b/compiler-rt/test/tsan/libdispatch/async_and_wait.c
--- a/compiler-rt/test/tsan/libdispatch/async_and_wait.c
+++ b/compiler-rt/test/tsan/libdispatch/async_and_wait.c
@@ -1,13 +1,25 @@
-// RUN: %clang_tsan %s -o %t
+// RUN: %clang_tsan %s -o %t -undefined dynamic_lookup
 // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
 
 #include "dispatch/dispatch.h"
 
 #include <stdio.h>
 
+// Allow compilation with pre-macOS 10.14 (and aligned) SDKs
+API_AVAILABLE(macos(10.14), ios(12.0), tvos(12.0), watchos(5.0))
+DISPATCH_EXPORT DISPATCH_NONNULL_ALL DISPATCH_NOTHROW
+void dispatch_async_and_wait(dispatch_queue_t queue,
+           DISPATCH_NOESCAPE dispatch_block_t block);
+
 long global;
 
 int main() {
+  // Guard execution on pre-macOS 10.14 (and aligned) platforms
+  if (dispatch_async_and_wait == NULL) {
+    fprintf(stderr, "Done.\n");
+    return 0;
+  }
+
   dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL);
   dispatch_semaphore_t s = dispatch_semaphore_create(0);
 
@@ -26,6 +38,7 @@
   global++;
 
   fprintf(stderr, "Done.\n");
+  return 0;
 }
 
 // CHECK: Done.