Index: llvm/CMakeLists.txt
===================================================================
--- llvm/CMakeLists.txt
+++ llvm/CMakeLists.txt
@@ -1163,17 +1163,18 @@
 
 add_subdirectory(lib)
 
-if( LLVM_INCLUDE_UTILS )
+if( LLVM_INCLUDE_UTILS AND NOT LLVM_ENABLE_UTILS )
   add_subdirectory(utils/FileCheck)
   add_subdirectory(utils/PerfectShuffle)
   add_subdirectory(utils/count)
   add_subdirectory(utils/not)
   add_subdirectory(utils/UnicodeData)
   add_subdirectory(utils/yaml-bench)
-  add_subdirectory(utils/split-file)
-  if( LLVM_INCLUDE_TESTS )
-    add_subdirectory(${LLVM_THIRD_PARTY_DIR}/unittest ${CMAKE_CURRENT_BINARY_DIR}/third-party/unittest)
-  endif()
+elseif( LLVM_ENABLE_UTILS )
+  # Build only specified utils from LLVM_ENABLE_UTILS
+  foreach(util ${LLVM_ENABLE_UTILS})
+    add_subdirectory(utils/${util})
+  endforeach()
 else()
   if ( LLVM_INCLUDE_TESTS )
     message(FATAL_ERROR "Including tests when not building utils will not work.
Index: llvm/docs/CMake.rst
===================================================================
--- llvm/docs/CMake.rst
+++ llvm/docs/CMake.rst
@@ -302,6 +302,10 @@
 enabled sub-projects. Nearly all of these variable names begin with
 ``LLVM_``.
 
+**LLVM_ENABLE_LIBS**:STRING
+  Semicolon-separated list of libraries to build, or ignore this argument for
+  building all.
+
 **BUILD_SHARED_LIBS**:BOOL
   Flag indicating if each LLVM component (e.g. Support) is built as a shared
   library (ON) or as a static library (OFF). Its default value is OFF. On
@@ -393,6 +397,10 @@
   the subdirectories of *unittests* for a complete list of unit tests.) It is
   possible to build all unit tests with the target *UnitTests*.
 
+**LLVM_ENABLE_TOOLS**:STRING
+  Semicolon-separated list of tools to build, or ignore this argument for building
+  all.
+
 **LLVM_BUILD_TOOLS**:BOOL
   Build LLVM tools. Defaults to ON. Targets for building each tool are generated
   in any case. You can build a tool separately by invoking its target. For
@@ -656,6 +664,10 @@
   If enabled, utility binaries like ``FileCheck`` and ``not`` will be installed
   to CMAKE_INSTALL_PREFIX.
 
+**LLVM_ENABLE_UTILS**:STRING
+  Semicolon-separated list of utils to build, or ignore this argument for building
+  all.
+
 **LLVM_INTEGRATED_CRT_ALLOC**:PATH
   On Windows, allows embedding a different C runtime allocator into the LLVM
   tools and libraries. Using a lock-free allocator such as the ones listed below
Index: llvm/lib/CMakeLists.txt
===================================================================
--- llvm/lib/CMakeLists.txt
+++ llvm/lib/CMakeLists.txt
@@ -3,49 +3,54 @@
 # `Demangle', `Support' and `TableGen' libraries are added on the top-level
 # CMakeLists.txt
 
-add_subdirectory(IR)
-add_subdirectory(FuzzMutate)
-add_subdirectory(FileCheck)
-add_subdirectory(InterfaceStub)
-add_subdirectory(IRPrinter)
-add_subdirectory(IRReader)
-add_subdirectory(CodeGen)
-add_subdirectory(BinaryFormat)
-add_subdirectory(Bitcode)
-add_subdirectory(Bitstream)
-add_subdirectory(DWARFLinker)
-add_subdirectory(DWARFLinkerParallel)
-add_subdirectory(Extensions)
-add_subdirectory(Frontend)
-add_subdirectory(Transforms)
-add_subdirectory(Linker)
-add_subdirectory(Analysis)
-add_subdirectory(LTO)
-add_subdirectory(MC)
-add_subdirectory(MCA)
-add_subdirectory(ObjCopy)
-add_subdirectory(Object)
-add_subdirectory(ObjectYAML)
-add_subdirectory(Option)
-add_subdirectory(Remarks)
-add_subdirectory(Debuginfod)
-add_subdirectory(DebugInfo)
-add_subdirectory(DWP)
-add_subdirectory(ExecutionEngine)
-add_subdirectory(Target)
-add_subdirectory(AsmParser)
-add_subdirectory(LineEditor)
-add_subdirectory(ProfileData)
-add_subdirectory(Passes)
-add_subdirectory(TargetParser)
-add_subdirectory(TextAPI)
-add_subdirectory(ToolDrivers)
-add_subdirectory(XRay)
+if(LLVM_ENABLE_LIBS)
+  # Build only specified libraries from LLVM_ENABLE_LIBS
+  foreach(lib ${LLVM_ENABLE_LIBS})
+    add_subdirectory(${lib})
+  endforeach()
+else()
+  add_subdirectory(IR)
+  add_subdirectory(FuzzMutate)
+  add_subdirectory(FileCheck)
+  add_subdirectory(InterfaceStub)
+  add_subdirectory(IRReader)
+  add_subdirectory(CodeGen)
+  add_subdirectory(BinaryFormat)
+  add_subdirectory(Bitcode)
+  add_subdirectory(Bitstream)
+  add_subdirectory(DWARFLinker)
+  add_subdirectory(Extensions)
+  add_subdirectory(Frontend)
+  add_subdirectory(Transforms)
+  add_subdirectory(Linker)
+  add_subdirectory(Analysis)
+  add_subdirectory(LTO)
+  add_subdirectory(MC)
+  add_subdirectory(MCA)
+  add_subdirectory(ObjCopy)
+  add_subdirectory(Object)
+  add_subdirectory(ObjectYAML)
+  add_subdirectory(Option)
+  add_subdirectory(Remarks)
+  add_subdirectory(Debuginfod)
+  add_subdirectory(DebugInfo)
+  add_subdirectory(DWP)
+  add_subdirectory(ExecutionEngine)
+  add_subdirectory(Target)
+  add_subdirectory(AsmParser)
+  add_subdirectory(LineEditor)
+  add_subdirectory(ProfileData)
+  add_subdirectory(Passes)
+  add_subdirectory(TextAPI)
+  add_subdirectory(ToolDrivers)
+  add_subdirectory(XRay)
+  add_subdirectory(WindowsDriver)
+  add_subdirectory(WindowsManifest)
+endif()
+
 if (LLVM_INCLUDE_TESTS)
   add_subdirectory(Testing)
 endif()
-add_subdirectory(WindowsDriver)
-add_subdirectory(WindowsManifest)
 
 set(LLVMCONFIGLIBRARYDEPENDENCIESINC "${LLVM_BINARY_DIR}/tools/llvm-config/LibraryDependencies.inc")
 
Index: llvm/tools/CMakeLists.txt
===================================================================
--- llvm/tools/CMakeLists.txt
+++ llvm/tools/CMakeLists.txt
@@ -45,9 +45,16 @@
 add_llvm_external_project(flang)
 add_llvm_external_project(bolt)
 
-# Automatically add remaining sub-directories containing a 'CMakeLists.txt'
-# file as external projects.
-add_llvm_implicit_projects()
+if(LLVM_ENABLE_TOOLS)
+  # Build only specified tools from LLVM_ENABLE_TOOLS
+  foreach(tool ${LLVM_ENABLE_TOOLS})
+    add_llvm_tool_subdirectory(${tool})
+  endforeach()
+else()
+  # Automatically add remaining sub-directories containing a 'CMakeLists.txt'
+  # file as external projects.
+  add_llvm_implicit_projects()
+endif()
 
 add_llvm_external_project(polly)