diff --git a/llvm/docs/CMake.rst b/llvm/docs/CMake.rst
--- a/llvm/docs/CMake.rst
+++ b/llvm/docs/CMake.rst
@@ -461,6 +461,10 @@
 **LLVM_PARALLEL_LINK_JOBS**:STRING
   Define the maximum number of concurrent link jobs.
 
+**LLVM_EXTERNALIZE_DEBUGINFO**:BOOL
+  Generate dSYM files and strip executables and libraries (Darwin Only).
+  Defaults to OFF.
+
 **LLVM_USE_CRT_{target}**:STRING
   On Windows, tells which version of the C runtime library (CRT) should be used.
   For example, -DLLVM_USE_CRT_RELEASE=MT would statically link the CRT into the