diff --git a/compiler-rt/test/asan/TestCases/report_error_summary.cpp b/compiler-rt/test/asan/TestCases/report_error_summary.cpp
--- a/compiler-rt/test/asan/TestCases/report_error_summary.cpp
+++ b/compiler-rt/test/asan/TestCases/report_error_summary.cpp
@@ -5,6 +5,9 @@
 
 #include <stdio.h>
 
+// Required for ld64 macOS 12.0+
+__attribute__((weak)) extern "C" void foo() {}
+
 extern "C" void __sanitizer_report_error_summary(const char *summary) {
   fprintf(stderr, "test_report_error_summary\n");
   // CHECK: test_report_error_summary