Remove dead code, implement indirection TODO

README.md

diff --git a/README.md b/README.md
index 204a8c8..e85d790 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@
     # particular library. It is also possible to omit both static_library and
     # shared_library, creating a header only toolchain lib.
     # Use with statically linkage.
-    static_library = "lib/libc++.a",
+    static_library = "lib/x86_64-unknown-linux-gnu/libc++.a",
     # Use with shared linkage.
     shared_library = "lib/libc++.so",
 

config/BUILD.bazel

diff --git a/config/BUILD.bazel b/config/BUILD.bazel
index 3fe4bdb..6d98879 100644
--- a/config/BUILD.bazel
+++ b/config/BUILD.bazel
@@ -57,6 +57,13 @@
 )
 
 alias(
+    name = "llvm_config_site_multiplexer",
+    actual = select({
+        ":linux_x86_64": "@clang_llvm_x86_64_linux_gnu_ubuntu//:llvm_config_site",
+    }),
+)
+
+alias(
     name = "startup_libs",
     actual = select({
         ":linux_x86_64": "@debian_stretch_amd64_sysroot//:startup_libs",

config/rules_cc_toolchain_config.BUILD

diff --git a/config/rules_cc_toolchain_config.BUILD b/config/rules_cc_toolchain_config.BUILD
index fc230ea..c60a09f 100644
--- a/config/rules_cc_toolchain_config.BUILD
+++ b/config/rules_cc_toolchain_config.BUILD
@@ -33,6 +33,11 @@
 )
 
 label_flag(
+    name = "llvm_config_site",
+    build_setting_default = "@rules_cc_toolchain//config:llvm_config_site_multiplexer",
+)
+
+label_flag(
     name = "compiler_rt",
     build_setting_default = "@rules_cc_toolchain//config:libclang_rt_multiplexer",
 )

third_party/clang_llvm_x86_64_linux_gnu_ubuntu.BUILD

diff --git a/third_party/clang_llvm_x86_64_linux_gnu_ubuntu.BUILD b/third_party/clang_llvm_x86_64_linux_gnu_ubuntu.BUILD
index 947ccda..741e352 100644
--- a/third_party/clang_llvm_x86_64_linux_gnu_ubuntu.BUILD
+++ b/third_party/clang_llvm_x86_64_linux_gnu_ubuntu.BUILD
@@ -66,23 +66,6 @@
 )
 
 cc_toolchain_import(
-    name = "llvm_libstddef",
-    hdrs = glob(["lib/clang/*/include/stddef.h"]),
-    includes = ["lib/clang/{clang_version}/include".format(clang_version = CLANG_VERSION)],
-    # runtime_path = "/usr/lib/x86_64-linux-gnu",
-    # shared_library = "lib/libunwind.so",
-    # static_library = "lib/x86_64-unknown-linux-gnu/libunwind.a",
-    target_compatible_with = select({
-        "@platforms//os:linux": ["@platforms//cpu:x86_64"],
-        "//conditions:default": ["@platforms//:incompatible"],
-    }),
-    visibility = ["@rules_cc_toolchain//config:__pkg__"],
-    deps = [
-        "@rules_cc_toolchain_config//:libc",
-    ],
-)
-
-cc_toolchain_import(
     name = "llvm_libcxx",
     hdrs = glob(["include/c++/v1/**"]),
     includes = ["include/c++/v1"],
@@ -93,11 +76,9 @@
     }),
     visibility = ["@rules_cc_toolchain//config:__pkg__"],
     deps = [
-        # TODO: Add more indirection.
-        ":llvm_config_site",
-        # ":llvm_libstddef",
         "@rules_cc_toolchain_config//:libc",
         "@rules_cc_toolchain_config//:libunwind",
+        "@rules_cc_toolchain_config//:llvm_config_site",
     ],
 )