diff --git a/clang/cmake/modules/AddClang.cmake b/clang/cmake/modules/AddClang.cmake
--- a/clang/cmake/modules/AddClang.cmake
+++ b/clang/cmake/modules/AddClang.cmake
@@ -86,11 +86,15 @@
     # llvm_add_library ignores BUILD_SHARED_LIBS if STATIC is explicitly set,
     # so we need to handle it here.
     if(BUILD_SHARED_LIBS)
-      set(LIBTYPE SHARED OBJECT)
+      set(LIBTYPE SHARED)
     else()
-      set(LIBTYPE STATIC OBJECT)
+      set(LIBTYPE STATIC)
+    endif()
+    if(NOT XCODE)
+      # The Xcode generator doesn't handle object libraries correctly.
+      list(APPEND LIBTYPE OBJECT)
+      set_property(GLOBAL APPEND PROPERTY CLANG_STATIC_LIBS ${name})
     endif()
-    set_property(GLOBAL APPEND PROPERTY CLANG_STATIC_LIBS ${name})
   endif()
   llvm_add_library(${name} ${LIBTYPE} ${ARG_UNPARSED_ARGUMENTS} ${srcs})