macOS: Use system linker with Rust+Bazel, other fixes

Author: auguwu

.bazelrc

@@ -45,10 +45,10 @@ build:macos --cxxopt=-fno-modules
 build:macos --features=-layering_check --features=-parse_headers
 
 # C++: Disable annoying warnings
-build:linux --cxxopt=-Wno-unused-command-line-argument
-build:linux --host_cxxopt=-Wno-unused-command-line-argument
-build:macos --cxxopt=-Wno-unused-command-line-argument
-build:macos --host_cxxopt=-Wno-unused-command-line-argument
+build:linux --copt=-Wno-unused-command-line-argument
+build:linux --host_copt=-Wno-unused-command-line-argument
+build:macos --copt=-Wno-unused-command-line-argument
+build:macos --host_copt=-Wno-unused-command-line-argument
 
 # `--config=libcxx`: Enables compilation and linking with libc++
 build:libcxx --cxxopt=-stdlib=libc++
@@ -86,6 +86,10 @@ common:ci --verbose_failures
 ## Rust
 build --@rules_rust//rust/toolchain/channel=nightly
 
+# Use Bazel's C++ toolchain as the linker for Rust targets instead of relying
+# on a system linker being available in the sandbox (fixes macOS linker errors).
+build --@rules_rust//rust/settings:experimental_use_cc_common_link=True
+
 build --aspects=@rules_rust//rust:defs.bzl%rust_clippy_aspect
 build --output_groups=+clippy_checks
 

MODULE.bazel.lock

@@ -20,9 +20,9 @@
 # SOFTWARE.
 
 bazel_dep(name = "googletest", version = "1.17.0.bcr.2")
-bazel_dep(name = "curl", version = "8.11.0.bcr.4")
-bazel_dep(name = "zlib", version = "1.3.1.bcr.8")
-bazel_dep(name = "zstd", version = "1.5.7")
+bazel_dep(name = "curl", version = "8.11.0.bcr.5")
+bazel_dep(name = "zlib", version = "1.3.2")
+bazel_dep(name = "zstd", version = "1.5.7.bcr.1")
 bazel_dep(name = "abseil-cpp", version = "20260107.1", repo_name = "absl")
 bazel_dep(name = "violet", version = "26.03.08")
 archive_override(

bazel/deps/cc.MODULE.bazel

@@ -19,7 +19,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
-bazel_dep(name = "rules_rust", version = "0.68.1")
+bazel_dep(name = "rules_rust", version = "0.69.0")
 
 ## Configure Rust toolchain
 rust = use_extension("@rules_rust//rust:extensions.bzl", "rust")

bazel/deps/rust.MODULE.bazel

@@ -28,7 +28,7 @@
   ### - linux
   valgrind,
   ### - darwin
-  apple-sdk_15,
+  apple-sdk_14,
   ## tools
   pkg-config,
   python3,
@@ -47,7 +47,7 @@
   ripgrep,
   taplo,
 }: let
-  darwinPackages = [apple-sdk_15];
+  darwinPackages = [apple-sdk_14];
   linuxPackages = [valgrind];
 
   # Alias for `llvmPackages_XX` that we aim to support. At the moment,