diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -942,17 +942,54 @@
           DESTINATION ${LLVM_INSTALL_PACKAGE_DIR}
           COMPONENT cmake-exports)
 
-      file(WRITE "${LLVM_BINARY_DIR}/include/llvm/Support/Extension.def.tmp" "//extension handlers\n")
+      set(LLVM_EXTENSION_DEF "${LLVM_BINARY_DIR}/include/llvm/Support/Extension.def")
+      file(WRITE "${LLVM_EXTENSION_DEF}.tmp" "//extension handlers\n")
       foreach(llvm_extension ${LLVM_STATIC_EXTENSIONS})
-        file(APPEND "${LLVM_BINARY_DIR}/include/llvm/Support/Extension.def.tmp" "HANDLE_EXTENSION(${llvm_extension})\n")
+          file(APPEND "${LLVM_EXTENSION_DEF}.tmp" "HANDLE_EXTENSION(${llvm_extension})\n")
       endforeach()
-      file(APPEND "${LLVM_BINARY_DIR}/include/llvm/Support/Extension.def.tmp" "#undef HANDLE_EXTENSION\n")
+      file(APPEND "${LLVM_EXTENSION_DEF}.tmp" "#undef HANDLE_EXTENSION\n")
 
       # only replace if there's an actual change
       execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
-        "${LLVM_BINARY_DIR}/include/llvm/Support/Extension.def.tmp"
-        "${LLVM_BINARY_DIR}/include/llvm/Support/Extension.def")
-      file(REMOVE "${LLVM_BINARY_DIR}/include/llvm/Support/Extension.def.tmp")
+          "${LLVM_EXTENSION_DEF}.tmp"
+          "${LLVM_EXTENSION_DEF}")
+      file(REMOVE "${LLVM_EXTENSION_DEF}.tmp")
+
+      # also generate build information for llvm-config
+      set(llvm_plugin_max_deps_length 0)
+      foreach(llvm_extension ${LLVM_STATIC_EXTENSIONS})
+        get_property(llvm_plugin_deps TARGET ${llvm_extension} PROPERTY LINK_LIBRARIES)
+        list(LENGTH llvm_plugin_deps llvm_plugin_deps_length)
+        if(llvm_plugin_deps_length GREATER llvm_plugin_max_deps_length)
+            set(llvm_plugin_max_deps_length ${llvm_plugin_deps_length})
+        endif()
+      endforeach()
+
+      set(LLVM_EXTENSION_DEPS "${LLVM_BINARY_DIR}/tools/llvm-config/ExtensionDependencies.inc")
+      file(WRITE
+          "${LLVM_EXTENSION_DEPS}.tmp"
+          "struct { const char* Name; const char* const RequiredLibraries[1 + 1 + ${llvm_plugin_max_deps_length}];} AvailableExtensions[] = {\n")
+      foreach(llvm_extension ${LLVM_STATIC_EXTENSIONS})
+        get_property(llvm_plugin_deps TARGET ${llvm_extension} PROPERTY LINK_LIBRARIES)
+        file(APPEND "${LLVM_EXTENSION_DEPS}.tmp" "\t{\"${llvm_extension}\", {\"${llvm_extension}\",")
+        foreach(llvm_plugin_dep ${llvm_plugin_deps})
+            STRING(REGEX REPLACE "^-l" ""  plugin_dep_name ${llvm_plugin_dep})
+            STRING(REGEX MATCH "^LLVM" is_llvm_library ${plugin_dep_name})
+            if(is_llvm_library)
+                STRING(REGEX REPLACE "^LLVM" ""  plugin_dep_name ${plugin_dep_name})
+                STRING(TOLOWER ${plugin_dep_name} plugin_dep_name)
+            endif()
+            file(APPEND "${LLVM_EXTENSION_DEPS}.tmp" "\"${plugin_dep_name}\", ")
+        endforeach()
+        file(APPEND "${LLVM_EXTENSION_DEPS}.tmp" "nullptr}},\n")
+      endforeach()
+      file(APPEND "${LLVM_EXTENSION_DEPS}.tmp" "};\n")
+
+      # only replace if there's an actual change
+      execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
+          "${LLVM_EXTENSION_DEPS}.tmp"
+          "${LLVM_EXTENSION_DEPS}")
+      file(REMOVE "${LLVM_EXTENSION_DEPS}.tmp")
   endif()
 endfunction()
 
diff --git a/llvm/tools/llvm-config/llvm-config.cpp b/llvm/tools/llvm-config/llvm-config.cpp
--- a/llvm/tools/llvm-config/llvm-config.cpp
+++ b/llvm/tools/llvm-config/llvm-config.cpp
@@ -46,6 +46,10 @@
 // create entries for pseudo groups like x86 or all-targets.
 #include "LibraryDependencies.inc"
 
+// Extension also register their dependencies as a dependency of "passes"
+// component.
+#include "ExtensionDependencies.inc"
+
 // LinkMode determines what libraries and flags are returned by llvm-config.
 enum LinkMode {
   // LinkModeAuto will link with the default link mode for the installation,
@@ -127,6 +131,21 @@
     }
     RequiredLibs.push_back(AC->Library);
   }
+  if (Name == "passes") {
+    for (auto const &AvailableExtension : AvailableExtensions) {
+      for (const char *const *Iter = &AvailableExtension.RequiredLibraries[0];
+           *Iter; ++Iter) {
+        AvailableComponent *AC = ComponentMap.lookup(*Iter);
+        if (!AC) {
+          RequiredLibs.push_back(*Iter);
+        } else {
+          VisitComponent(*Iter, ComponentMap, VisitedComponents, RequiredLibs,
+                         IncludeNonInstalled, GetComponentNames,
+                         GetComponentLibraryPath, Missing, DirSep);
+        }
+      }
+    }
+  }
 }
 
 /// Compute the list of required libraries for a given list of