Update bindgen rules to build clang from source. (bazelbuild#1998)

* Update bindgen rules to build clang from source.

* Regenerate documentation

.bazelci/presubmit.yml

@@ -24,7 +24,6 @@ default_macos_targets: &default_macos_targets
 default_windows_targets: &default_windows_targets
   - "--" # Allows negative patterns; hack for https://github.com/bazelbuild/continuous-integration/pull/245
   - "//..."
-  - "-//bindgen/..."
   - "-//test/proto/..."
   - "-//test/unit/pipelined_compilation/..."
 crate_universe_vendor_example_targets: &crate_universe_vendor_example_targets
@@ -349,9 +348,6 @@ tasks:
       - "-//sys/..."
       # See https://github.com/bazelbuild/bazel/issues/9987
       - "-//ffi/rust_calling_c:matrix_dylib_test"
-      # The bindgen rules currently do not work on RBE
-      # see: https://github.com/bazelbuild/rules_rust/issues/919
-      - "-//bindgen/..."
     shell_commands:
       - sed -i 's/^# load("@bazelci_rules/load("@bazelci_rules/' WORKSPACE.bazel
       - sed -i 's/^# rbe_preconfig/rbe_preconfig/' WORKSPACE.bazel
@@ -378,9 +374,6 @@ tasks:
     windows_targets: &windows_targets
       - "--" # Allows negative patterns; hack for https://github.com/bazelbuild/continuous-integration/pull/245
       - "//..."
-      # The bindgen rules currently do not work on windows
-      # see: https://github.com/bazelbuild/rules_rust/issues/919
-      - "-//bindgen/..."
       # The proto rules do not work on windows
       - "-//proto/..."
       # The wasm rules do not work on windows

WORKSPACE.bazel

@@ -24,6 +24,10 @@ rust_bindgen_dependencies()
 
 rust_bindgen_register_toolchains()
 
+load("@rules_rust//bindgen:transitive_repositories.bzl", "rust_bindgen_transitive_dependencies")
+
+rust_bindgen_transitive_dependencies()
+
 load("@rules_rust//tools/rust_analyzer:deps.bzl", "rust_analyzer_dependencies")
 
 rust_analyzer_dependencies()

bindgen/3rdparty/BUILD.bazel

@@ -14,20 +14,25 @@ crates_vendor(
         "indexmap": [crate.annotation(
             gen_build_script = True,
         )],
-        "libloading": [crate.annotation(
-            gen_build_script = True,
-        )],
         "log": [crate.annotation(
             rustc_flags = ["--cfg=atomic_cas"],
         )],
+        "winapi": [crate.annotation(
+            gen_build_script = True,
+        )],
     },
     cargo_lockfile = "Cargo.Bazel.lock",
     generate_build_scripts = False,
     mode = "remote",
     packages = {
         "bindgen": crate.spec(
+            features = ["runtime"],
             version = "0.60.1",
         ),
+        "clang-sys": crate.spec(
+            # Should match the version of llvm-project being used.
+            features = ["clang_14_0"],
+        ),
         "libloading": crate.spec(
             version = "0.7.3",
         ),