Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -2080,6 +2080,8 @@
   Flags<[Unsupported]>;
 def print_prog_name_EQ : Joined<["-", "--"], "print-prog-name=">,
   HelpText<"Print the full program path of <name>">, MetaVarName<"<name>">;
+def print_resource_dir : Flag<["-", "--"], "print-resource-dir">,
+  HelpText<"Print the full pathname of the resource directory">;
 def print_search_dirs : Flag<["-", "--"], "print-search-dirs">,
   HelpText<"Print the paths used for finding libraries and programs">;
 def private__bundle : Flag<["-"], "private_bundle">;
Index: lib/Driver/Driver.cpp
===================================================================
--- lib/Driver/Driver.cpp
+++ lib/Driver/Driver.cpp
@@ -1169,6 +1169,11 @@
   if (C.getArgs().hasArg(options::OPT_v))
     TC.printVerboseInfo(llvm::errs());
 
+  if (C.getArgs().hasArg(options::OPT_print_resource_dir)) {
+    llvm::outs() << ResourceDir << "\n";
+    return false;
+  }
+
   if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
     llvm::outs() << "programs: =";
     bool separator = false;
Index: test/Driver/immediate-options.c
===================================================================
--- test/Driver/immediate-options.c
+++ test/Driver/immediate-options.c
@@ -12,3 +12,9 @@
 // RUN: %clang -print-search-dirs | FileCheck %s -check-prefix=PRINT-SEARCH-DIRS
 // PRINT-SEARCH-DIRS: programs: ={{.*}}
 // PRINT-SEARCH-DIRS: libraries: ={{.*}}
+
+// Test if the -print-resource-dir option is accepted without error.
+// Allow unspecified output because the value of CLANG_RESOURCE_DIR is unknown.
+// RUN: %clang -print-resource-dir | FileCheck %s -check-prefix=PRINT-RESOURCE-DIR
+// PRINT-RESOURCE-DIR: {{.*}}
+