llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: None (llvmbot)

<details>
<summary>Changes</summary>

Backport 3a4c7cc

Requested by: @<!-- -->aemerson

---
Full diff: https://github.com/llvm/llvm-project/pull/101432.diff


1 Files Affected:

- (modified) compiler-rt/lib/rtsan/rtsan_interceptors.cpp (+12) 


``````````diff
diff --git a/compiler-rt/lib/rtsan/rtsan_interceptors.cpp 
b/compiler-rt/lib/rtsan/rtsan_interceptors.cpp
index 4d5423ec629d2..b63040446e53c 100644
--- a/compiler-rt/lib/rtsan/rtsan_interceptors.cpp
+++ b/compiler-rt/lib/rtsan/rtsan_interceptors.cpp
@@ -21,6 +21,18 @@
 #include "rtsan/rtsan_context.h"
 
 #if SANITIZER_APPLE
+
+#if TARGET_OS_MAC
+// On MacOS OSSpinLockLock is deprecated and no longer present in the headers,
+// but the symbol still exists on the system. Forward declare here so we
+// don't get compilation errors.
+#include <stdint.h>
+extern "C" {
+typedef int32_t OSSpinLock;
+void OSSpinLockLock(volatile OSSpinLock *__lock);
+}
+#endif
+
 #include <libkern/OSAtomic.h>
 #include <os/lock.h>
 #endif

``````````

</details>


https://github.com/llvm/llvm-project/pull/101432
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