Index: llvm/CMakeLists.txt
===================================================================
--- llvm/CMakeLists.txt
+++ llvm/CMakeLists.txt
@@ -883,6 +883,9 @@
 # use export_executable_symbols(target).
 set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
 
+set(LLVM_ALL_DISTRIBUTION_COMPONENTS ""
+    CACHE INTERNAL "List of all possible values for LLVM_DISTRIBUTION_COMPONENTS")
+
 include(AddLLVM)
 include(TableGen)
 
Index: llvm/cmake/modules/AddLLVM.cmake
===================================================================
--- llvm/cmake/modules/AddLLVM.cmake
+++ llvm/cmake/modules/AddLLVM.cmake
@@ -700,6 +700,8 @@
     set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS_BUILDTREE_ONLY ${name})
   else()
     if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ARG_INSTALL_WITH_TOOLCHAIN)
+      set(LLVM_ALL_DISTRIBUTION_COMPONENTS "${LLVM_ALL_DISTRIBUTION_COMPONENTS};${name}"
+          CACHE INTERNAL "List of all possible values for LLVM_DISTRIBUTION_COMPONENTS")
 
       set(export_to_llvmexports)
       if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
@@ -912,6 +914,9 @@
 
   if ( ${name} IN_LIST LLVM_TOOLCHAIN_TOOLS OR NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
     if( LLVM_BUILD_TOOLS )
+      set(LLVM_ALL_DISTRIBUTION_COMPONENTS "${LLVM_ALL_DISTRIBUTION_COMPONENTS};${name}"
+          CACHE INTERNAL "List of all possible values for LLVM_DISTRIBUTION_COMPONENTS")
+
       set(export_to_llvmexports)
       if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
           NOT LLVM_DISTRIBUTION_COMPONENTS)
@@ -960,6 +965,9 @@
   set_target_properties(${name} PROPERTIES FOLDER "Utils")
   if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
     if (LLVM_INSTALL_UTILS AND LLVM_BUILD_UTILS)
+      set(LLVM_ALL_DISTRIBUTION_COMPONENTS "${LLVM_ALL_DISTRIBUTION_COMPONENTS};${name}"
+          CACHE INTERNAL "List of all possible values for LLVM_DISTRIBUTION_COMPONENTS")
+
       set(export_to_llvmexports)
       if (${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
           NOT LLVM_DISTRIBUTION_COMPONENTS)
Index: llvm/cmake/modules/TableGen.cmake
===================================================================
--- llvm/cmake/modules/TableGen.cmake
+++ llvm/cmake/modules/TableGen.cmake
@@ -151,6 +151,9 @@
   endif()
 
   if (${project} STREQUAL LLVM AND NOT LLVM_INSTALL_TOOLCHAIN_ONLY AND LLVM_BUILD_UTILS)
+    set(LLVM_ALL_DISTRIBUTION_COMPONENTS "${LLVM_ALL_DISTRIBUTION_COMPONENTS};${target}"
+        CACHE INTERNAL "List of all possible values for LLVM_DISTRIBUTION_COMPONENTS")
+
     set(export_to_llvmexports)
     if(${target} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
         NOT LLVM_DISTRIBUTION_COMPONENTS)
Index: llvm/docs/BuildingADistribution.rst
===================================================================
--- llvm/docs/BuildingADistribution.rst
+++ llvm/docs/BuildingADistribution.rst
@@ -176,7 +176,8 @@
   This variable can be set to a semi-colon separated list of LLVM build system
   components to install. All LLVM-based tools are components, as well as most
   of the libraries and runtimes. Component names match the names of the build
-  system targets.
+  system targets. The list of currently available components (based on enabled
+  options) can be found in *LLVM_ALL_DISTRIBUTION_COMPONENTS* cache variable.
 
 **LLVM_RUNTIME_DISTRIBUTION_COMPONENTS**:STRING
   This variable can be set to a semi-colon separated list of runtime library