Another round of toolchain/platform improvements

.bazelrc

@@ -2,6 +2,7 @@ import %workspace%/bazel/defaults.bazelrc
 
 common --test_output=errors
 common --incompatible_disallow_empty_glob=False
+common --enable_platform_specific_config
 
 # Define value used by tests
 common --define=SOME_VAR=SOME_VALUE
@@ -10,9 +11,11 @@ common --define=SOME_VAR=SOME_VALUE
 common --@pypi//venv=default
 
 common --incompatible_enable_cc_toolchain_resolution
-common --@toolchains_llvm_bootstrapped//config:experimental_stub_libgcc_s
+common --@llvm//config:experimental_stub_libgcc_s
 common --@rules_cc//cc/toolchains/args/archiver_flags:use_libtool_on_macos=false
 
+common:linux --host_platform=//bazel/platforms:linux_host
+
 # TODO(bzlmod): Don't break proto
 common --per_file_copt=external/.*protobuf.*@--PROTOBUF_WAS_NOT_SUPPOSED_TO_BE_BUILT
 common --host_per_file_copt=external/.*protobuf.*@--PROTOBUF_WAS_NOT_SUPPOSED_TO_BE_BUILT
@@ -22,6 +25,7 @@ common --repo_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
 common --repo_env=BAZEL_NO_APPLE_CPP_TOOLCHAIN=1
 
 common:ci --toolchain_resolution_debug='@@bazel_tools//tools/cpp:toolchain_type'
+common:ci --toolchain_resolution_debug='.*rust.*'
 
 common:release --build_tag_filters=release
 common:release --stamp

BUILD.bazel

@@ -13,6 +13,8 @@ load("//uv/private/manifest:defs.bzl", "gazelle_python_manifest")
 gazelle_python_manifest(
     name = "gazelle_python_manifest",
     hub = "pypi",
+    # TODO: this doesn't work on linux because it hardcodes the @platforms//host platform which won't match rust toolchains.
+    tags = ["manual"],
     venvs = [
         "default",
     ],

MODULE.bazel

@@ -52,53 +52,17 @@ use_repo(tel, "aspect_tools_telemetry_report")
 # Dev deps are the remainder of the file
 
 # LLVM configuration
-bazel_dep(name = "toolchains_llvm_bootstrapped", version = "0.2.5", dev_dependency = IS_RELEASE)
-archive_override(
-    module_name = "toolchains_llvm_bootstrapped",
-    integrity = "sha256-+nddimV34BYO8YExiKLYG2kMoA2Sv+5ZoMRPQLJxNfE=",
-    patch_strip = 1,
-    patches = [
-        "//bazel/patches:llvm_darwin_sysroot.patch",
-    ],
-    strip_prefix = "toolchains_llvm_bootstrapped-121c8419394e76b5652c161369743c564799b2e3",
-    urls = ["https://github.com/cerisier/toolchains_llvm_bootstrapped/archive/121c8419394e76b5652c161369743c564799b2e3/master.tar.gz"],
-)
+bazel_dep(name = "llvm", version = "0.6.1", dev_dependency = IS_RELEASE)
 
 register_toolchains(
-    "@toolchains_llvm_bootstrapped//toolchain:all",
-    dev_dependency = IS_RELEASE,
-)
-
-# Rust configuration
-bazel_dep(name = "rules_rust", version = "0.68.1", dev_dependency = IS_RELEASE)
-
-rust = use_extension(
-    "@rules_rust//rust:extensions.bzl",
-    "rust",
-    dev_dependency = IS_RELEASE,
-)
-rust.toolchain(
-    edition = "2024",
-    extra_target_triples = [
-        "aarch64-apple-darwin",
-        "x86_64-apple-darwin",
-        "aarch64-unknown-linux-musl",
-        "x86_64-unknown-linux-musl",
-    ],
-    versions = ["1.88.0"],
-)
-use_repo(rust, "rust_toolchains")
-
-register_toolchains(
-    "@rust_toolchains//:all",
+    "@llvm//toolchain:all",
     dev_dependency = IS_RELEASE,
 )
 
 bazel_dep(name = "bazelrc-preset.bzl", version = "1.4.0", dev_dependency = IS_RELEASE)
 bazel_dep(name = "bazel_env.bzl", version = "0.5.0", dev_dependency = IS_RELEASE)
 bazel_dep(name = "bzip2", version = "1.0.8.bcr.3", dev_dependency = IS_RELEASE)
 bazel_dep(name = "gazelle", version = "0.45.0", dev_dependency = IS_RELEASE)
-bazel_dep(name = "rules_rs", version = "0.0.26", dev_dependency = IS_RELEASE)
 bazel_dep(name = "xz", version = "5.4.5.bcr.7", dev_dependency = IS_RELEASE)
 bazel_dep(name = "zstd", version = "1.5.7", dev_dependency = IS_RELEASE)
 bazel_dep(name = "rules_multitool", version = "1.9.0", dev_dependency = IS_RELEASE)
@@ -107,6 +71,24 @@ multitool = use_extension("@rules_multitool//multitool:extension.bzl", "multitoo
 multitool.hub(lockfile = "//tools:tools.lock.json")
 use_repo(multitool, "multitool")
 
+# Rust configuration
+bazel_dep(name = "rules_rs", version = "0.0.37", dev_dependency = IS_RELEASE)
+
+toolchains = use_extension("@rules_rs//rs/experimental/toolchains:module_extension.bzl", "toolchains", dev_dependency = IS_RELEASE)
+toolchains.toolchain(
+    edition = "2024",
+    version = "1.93.1",
+)
+use_repo(toolchains, "default_rust_toolchains")
+
+register_toolchains(
+    "@default_rust_toolchains//:all",
+    dev_dependency = IS_RELEASE,
+)
+
+rules_rust = use_extension("@rules_rs//rs/experimental:rules_rust.bzl", "rules_rust")
+use_repo(rules_rust, "rules_rust")
+
 crate = use_extension(
     "@rules_rs//rs:extensions.bzl",
     "crate",
@@ -118,10 +100,13 @@ crate.from_cargo(
     cargo_toml = "//:Cargo.toml",
     platform_triples = [
         "aarch64-apple-darwin",
+        "aarch64-unknown-linux-gnu",
         "aarch64-unknown-linux-musl",
         "x86_64-apple-darwin",
+        "x86_64-unknown-linux-gnu",
         "x86_64-unknown-linux-musl",
     ],
+    use_experimental_platforms = True,
 )
 crate.annotation(
     crate = "backtrace",
@@ -148,6 +133,32 @@ crate.annotation(
     repositories = ["crates"],
     deps = ["@@xz+//:lzma"],
 )
+crate.annotation(
+    additive_build_file_content = """
+load("@rules_cc//cc:defs.bzl", "cc_import")
+
+cc_import(
+    name = "windows_import_lib",
+    static_library = glob(["lib/*.a"])[0],
+)
+""",
+    crate = "windows_x86_64_gnullvm",
+    gen_build_script = "off",
+    deps = [":windows_import_lib"],
+)
+crate.annotation(
+    additive_build_file_content = """
+load("@rules_cc//cc:defs.bzl", "cc_import")
+
+cc_import(
+    name = "windows_import_lib",
+    static_library = glob(["lib/*.a"])[0],
+)
+""",
+    crate = "windows_aarch64_gnullvm",
+    gen_build_script = "off",
+    deps = [":windows_import_lib"],
+)
 use_repo(crate, "crates")
 
 # TODO: Replace with bazel_features?

bazel/platforms/BUILD.bazel

@@ -1,43 +1,16 @@
-load("//bazel/platforms/config:defs.bzl", "linker_suffix", "platforms")
-
-[platform(
-    name = "{}_{}{}".format(
-        p.os,
-        p.cpu,
-        linker_suffix(
-            "_",
-            p.linker,
-        ),
-    ),
+platform(
+    name = "linux_host",
     constraint_values = [
-        "@platforms//os:{}".format(p.os),
-        "@platforms//cpu:{}".format(p.cpu),
-        "//bazel/platforms/linkers:{}".format(p.linker),
+        "@llvm//constraints/libc:gnu.2.28",
     ],
-    visibility = ["//visibility:public"],
-) for p in platforms]
-
-alias(
-    name = "linux_amd64",
-    actual = ":linux_x86_64",
-    visibility = ["//visibility:public"],
-)
-
-alias(
-    name = "linux_arm64",
-    actual = ":linux_aarch64",
-    visibility = ["//visibility:public"],
+    parents = ["@platforms//host"],
 )
 
 platform(
     name = "rbe",
-    constraint_values = [
-        "@platforms//cpu:x86_64",
-        "@platforms//os:linux",
-        "@bazel_tools//tools/cpp:clang",
-    ],
     exec_properties = {
         "container-image": "docker://ubuntu:22.04",
         "OSFamily": "Linux",
     },
+    parents = ["@rules_rs//rs/experimental/platforms:x86_64-unknown-linux-gnu"],
 )