diff --git a/llvm/cmake/modules/LLVMExternalProjectUtils.cmake b/llvm/cmake/modules/LLVMExternalProjectUtils.cmake
--- a/llvm/cmake/modules/LLVMExternalProjectUtils.cmake
+++ b/llvm/cmake/modules/LLVMExternalProjectUtils.cmake
@@ -90,7 +90,7 @@
         list(APPEND ARG_TOOLCHAIN_TOOLS llvm-lib)
       else()
         # TODO: These tools don't fully support Mach-O format yet.
-        list(APPEND ARG_TOOLCHAIN_TOOLS llvm-objcopy llvm-strip)
+        list(APPEND ARG_TOOLCHAIN_TOOLS llvm-objcopy llvm-strip llvm-readelf)
       endif()
     endif()
   endif()
@@ -204,6 +204,9 @@
     if(llvm-strip IN_LIST TOOLCHAIN_TOOLS AND NOT ARG_STRIP_TOOL)
       list(APPEND compiler_args -DCMAKE_STRIP=${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-strip${CMAKE_EXECUTABLE_SUFFIX})
     endif()
+    if(llvm-readelf IN_LIST TOOLCHAIN_TOOLS)
+      list(APPEND compiler_args -DCMAKE_READELF=${LLVM_RUNTIME_OUTPUT_INTDIR}/llvm-readelf${CMAKE_EXECUTABLE_SUFFIX})
+    endif()
     list(APPEND ARG_DEPENDS ${TOOLCHAIN_TOOLS})
   endif()