diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -871,6 +871,8 @@
   process_llvm_pass_plugins()
 endif()
 
+set(CLANG_INSTALL_LIBDIR_BASENAME "lib${CLANG_LIBDIR_SUFFIX}")
+
 configure_file(
   ${CLANG_SOURCE_DIR}/include/clang/Config/config.h.cmake
   ${CLANG_BINARY_DIR}/include/clang/Config/config.h)
diff --git a/clang/include/clang/Config/config.h.cmake b/clang/include/clang/Config/config.h.cmake
--- a/clang/include/clang/Config/config.h.cmake
+++ b/clang/include/clang/Config/config.h.cmake
@@ -53,8 +53,8 @@
 /* Default architecture for SystemZ. */
 #define CLANG_SYSTEMZ_DEFAULT_ARCH "${CLANG_SYSTEMZ_DEFAULT_ARCH}"
 
-/* Multilib suffix for libdir. */
-#define CLANG_LIBDIR_SUFFIX "${CLANG_LIBDIR_SUFFIX}"
+/* Multilib basename for libdir. */
+#define CLANG_INSTALL_LIBDIR_BASENAME "${CLANG_INSTALL_LIBDIR_BASENAME}"
 
 /* Relative directory for resource files */
 #define CLANG_RESOURCE_DIR "${CLANG_RESOURCE_DIR}"
diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -180,7 +180,7 @@
     // path of the embedding binary, which for LLVM binaries will be in bin/.
     // ../lib gets us to lib/ in both cases.
     P = llvm::sys::path::parent_path(Dir);
-    llvm::sys::path::append(P, Twine("lib") + CLANG_LIBDIR_SUFFIX, "clang",
+    llvm::sys::path::append(P, CLANG_INSTALL_LIBDIR_BASENAME, "clang",
                             CLANG_VERSION_STRING);
   }
 
diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -502,7 +502,8 @@
 
     SmallString<1024> Plugin;
     llvm::sys::path::native(
-        Twine(D.Dir) + "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" + Suffix,
+        Twine(D.Dir) + "/../" CLANG_INSTALL_LIBDIR_BASENAME "/LLVMgold" +
+            Suffix,
         Plugin);
     CmdArgs.push_back(Args.MakeArgString(Plugin));
   }
@@ -658,7 +659,7 @@
     // runtime
     SmallString<256> DefaultLibPath =
         llvm::sys::path::parent_path(TC.getDriver().Dir);
-    llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX);
+    llvm::sys::path::append(DefaultLibPath, CLANG_INSTALL_LIBDIR_BASENAME);
     CmdArgs.push_back("-rpath");
     CmdArgs.push_back(Args.MakeArgString(DefaultLibPath));
   }
@@ -671,7 +672,7 @@
   // runtime.
   SmallString<256> DefaultLibPath =
       llvm::sys::path::parent_path(TC.getDriver().Dir);
-  llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX);
+  llvm::sys::path::append(DefaultLibPath, CLANG_INSTALL_LIBDIR_BASENAME);
   CmdArgs.push_back(Args.MakeArgString("-L" + DefaultLibPath));
 }
 
@@ -1947,7 +1948,7 @@
 
   // Add path to lib-debug folders
   SmallString<256> DefaultLibPath = llvm::sys::path::parent_path(D.Dir);
-  llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX);
+  llvm::sys::path::append(DefaultLibPath, CLANG_INSTALL_LIBDIR_BASENAME);
   LibraryPaths.emplace_back(DefaultLibPath.c_str());
 
   // Build list of Static Device Libraries SDLs specified by -l option
@@ -2076,7 +2077,7 @@
 
   // Add path to clang lib / lib64 folder.
   SmallString<256> DefaultLibPath = llvm::sys::path::parent_path(D.Dir);
-  llvm::sys::path::append(DefaultLibPath, Twine("lib") + CLANG_LIBDIR_SUFFIX);
+  llvm::sys::path::append(DefaultLibPath, CLANG_INSTALL_LIBDIR_BASENAME);
   LibraryPaths.emplace_back(DefaultLibPath.c_str());
 
   // Add user defined library paths from LIBRARY_PATH.
diff --git a/clang/lib/Driver/ToolChains/Cuda.cpp b/clang/lib/Driver/ToolChains/Cuda.cpp
--- a/clang/lib/Driver/ToolChains/Cuda.cpp
+++ b/clang/lib/Driver/ToolChains/Cuda.cpp
@@ -592,7 +592,7 @@
   // Add paths for the default clang library path.
   SmallString<256> DefaultLibPath =
       llvm::sys::path::parent_path(TC.getDriver().Dir);
-  llvm::sys::path::append(DefaultLibPath, "lib" CLANG_LIBDIR_SUFFIX);
+  llvm::sys::path::append(DefaultLibPath, CLANG_INSTALL_LIBDIR_BASENAME);
   CmdArgs.push_back(Args.MakeArgString(Twine("-L") + DefaultLibPath));
 
   for (const auto &II : Inputs) {
diff --git a/lldb/cmake/modules/LLDBGenerateConfig.cmake b/lldb/cmake/modules/LLDBGenerateConfig.cmake
--- a/lldb/cmake/modules/LLDBGenerateConfig.cmake
+++ b/lldb/cmake/modules/LLDBGenerateConfig.cmake
@@ -19,6 +19,8 @@
 
 check_library_exists(compression compression_encode_buffer "" HAVE_LIBCOMPRESSION)
 
+set(LLDB_INSTALL_LIBDIR_BASENAME "lib${LLDB_LIBDIR_SUFFIX}")
+
 # These checks exist in LLVM's configuration, so I want to match the LLVM names
 # so that the check isn't duplicated, but we translate them into the LLDB names
 # so that I don't have to change all the uses at the moment.
diff --git a/lldb/include/lldb/Host/Config.h.cmake b/lldb/include/lldb/Host/Config.h.cmake
--- a/lldb/include/lldb/Host/Config.h.cmake
+++ b/lldb/include/lldb/Host/Config.h.cmake
@@ -51,7 +51,7 @@
 
 #cmakedefine LLDB_PYTHON_HOME R"(${LLDB_PYTHON_HOME})"
 
-#define LLDB_LIBDIR_SUFFIX "${LLVM_LIBDIR_SUFFIX}"
+#define LLDB_INSTALL_LIBDIR_BASENAME "${LLDB_INSTALL_LIBDIR_BASENAME}"
 
 #cmakedefine LLDB_GLOBAL_INIT_DIRECTORY R"(${LLDB_GLOBAL_INIT_DIRECTORY})"
 
diff --git a/lldb/source/Host/linux/HostInfoLinux.cpp b/lldb/source/Host/linux/HostInfoLinux.cpp
--- a/lldb/source/Host/linux/HostInfoLinux.cpp
+++ b/lldb/source/Host/linux/HostInfoLinux.cpp
@@ -175,7 +175,7 @@
 }
 
 bool HostInfoLinux::ComputeSystemPluginsDirectory(FileSpec &file_spec) {
-  FileSpec temp_file("/usr/lib" LLDB_LIBDIR_SUFFIX "/lldb/plugins");
+  FileSpec temp_file("/usr/" LLDB_INSTALL_LIBDIR_BASENAME "/lldb/plugins");
   FileSystem::Instance().Resolve(temp_file);
   file_spec.SetDirectory(temp_file.GetPath());
   return true;
diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangHost.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangHost.cpp
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangHost.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangHost.cpp
@@ -55,11 +55,11 @@
   static const llvm::StringRef kResourceDirSuffixes[] = {
       // LLVM.org's build of LLDB uses the clang resource directory placed
       // in $install_dir/lib{,64}/clang/$clang_version.
-      "lib" CLANG_LIBDIR_SUFFIX "/clang/" CLANG_VERSION_STRING,
+      CLANG_INSTALL_LIBDIR_BASENAME "/clang/" CLANG_VERSION_STRING,
       // swift-lldb uses the clang resource directory copied from swift, which
       // by default is placed in $install_dir/lib{,64}/lldb/clang. LLDB places
-      // it there, so we use LLDB_LIBDIR_SUFFIX.
-      "lib" LLDB_LIBDIR_SUFFIX "/lldb/clang",
+      // it there, so we use LLDB_INSTALL_LIBDIR_BASENAME.
+      LLDB_INSTALL_LIBDIR_BASENAME "/lldb/clang",
   };
 
   for (const auto &Suffix : kResourceDirSuffixes) {
diff --git a/lldb/unittests/Expression/ClangParserTest.cpp b/lldb/unittests/Expression/ClangParserTest.cpp
--- a/lldb/unittests/Expression/ClangParserTest.cpp
+++ b/lldb/unittests/Expression/ClangParserTest.cpp
@@ -37,7 +37,8 @@
 TEST_F(ClangHostTest, ComputeClangResourceDirectory) {
 #if !defined(_WIN32)
   std::string path_to_liblldb = "/foo/bar/lib/";
-  std::string path_to_clang_dir = "/foo/bar/lib" LLDB_LIBDIR_SUFFIX "/clang/" CLANG_VERSION_STRING;
+  std::string path_to_clang_dir =
+      "/foo/bar/" LLDB_INSTALL_LIBDIR_BASENAME "/clang/" CLANG_VERSION_STRING;
 #else
   std::string path_to_liblldb = "C:\\foo\\bar\\lib";
   std::string path_to_clang_dir = "C:\\foo\\bar\\lib\\clang\\" CLANG_VERSION_STRING;
diff --git a/llvm/utils/gn/secondary/clang/include/clang/Config/BUILD.gn b/llvm/utils/gn/secondary/clang/include/clang/Config/BUILD.gn
--- a/llvm/utils/gn/secondary/clang/include/clang/Config/BUILD.gn
+++ b/llvm/utils/gn/secondary/clang/include/clang/Config/BUILD.gn
@@ -18,6 +18,7 @@
     "CLANG_DEFAULT_OBJCOPY=objcopy",
     "CLANG_DEFAULT_OPENMP_RUNTIME=libomp",
     "CLANG_DEFAULT_UNWINDLIB=",
+    "CLANG_INSTALL_LIBDIR_BASENAME=lib",
     "CLANG_OPENMP_NVPTX_DEFAULT_ARCH=sm_35",
     "CLANG_LIBDIR_SUFFIX=",
     "CLANG_RESOURCE_DIR=",
diff --git a/llvm/utils/gn/secondary/lldb/include/lldb/Host/BUILD.gn b/llvm/utils/gn/secondary/lldb/include/lldb/Host/BUILD.gn
--- a/llvm/utils/gn/secondary/lldb/include/lldb/Host/BUILD.gn
+++ b/llvm/utils/gn/secondary/lldb/include/lldb/Host/BUILD.gn
@@ -21,6 +21,7 @@
     "LLDB_ENABLE_PYTHON=",
     "LLDB_ENABLE_FBSDVMCORE=",
     "LLDB_EMBED_PYTHON_HOME=",
+    "LLDB_INSTALL_LIBDIR_BASENAME=lib",
     "LLDB_GLOBAL_INIT_DIRECTORY=",
 
     "LLDB_PYTHON_HOME=",
diff --git a/utils/bazel/llvm-project-overlay/clang/include/clang/Config/config.h b/utils/bazel/llvm-project-overlay/clang/include/clang/Config/config.h
--- a/utils/bazel/llvm-project-overlay/clang/include/clang/Config/config.h
+++ b/utils/bazel/llvm-project-overlay/clang/include/clang/Config/config.h
@@ -67,8 +67,8 @@
 /* Default architecture for SystemZ. */
 #define CLANG_SYSTEMZ_DEFAULT_ARCH "z10"
 
-/* Multilib suffix for libdir. */
-#define CLANG_LIBDIR_SUFFIX ""
+/* Multilib basename for libdir. */
+#define CLANG_INSTALL_LIBDIR_BASENAME "lib"
 
 /* Relative directory for resource files */
 #define CLANG_RESOURCE_DIR ""