diff --git a/llvm/cmake/modules/FindGRPC.cmake b/llvm/cmake/modules/FindGRPC.cmake
--- a/llvm/cmake/modules/FindGRPC.cmake
+++ b/llvm/cmake/modules/FindGRPC.cmake
@@ -132,7 +132,12 @@
         ARGS ${Flags} "${ProtoSourceAbsolutePath}"
         DEPENDS "${ProtoSourceAbsolutePath}")
 
-  add_llvm_library(${LibraryName} ${GeneratedProtoSource}
+  set(LIBTYPE STATIC)
+  if(NOT XCODE)
+    # The Xcode generator doesn't handle object libraries correctly.
+    list(APPEND LIBTYPE OBJECT)
+  endif()
+  llvm_add_library(${LibraryName} ${LIBTYPE} ${GeneratedProtoSource}
     PARTIAL_SOURCES_INTENDED
     LINK_LIBS PUBLIC grpc++ protobuf)