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Enable Windows Bazel Rust test coverage

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This commit is contained in:
Michael Bolin
2026-04-02 23:43:50 -07:00
parent a70aee1a1e
commit 4263184761
26 changed files with 813 additions and 118 deletions
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20
patches/rules_rust_windows_bootstrap_process_wrapper_linker.patch
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@@ -1,23 +1,21 @@
--- a/rust/private/rustc.bzl
+++ b/rust/private/rustc.bzl
@@ -472,7 +472,19 @@
@@ -472,7 +472,17 @@
)
ld_is_direct_driver = False
- if not ld or toolchain.linker_preference == "rust":
+ # The bootstrap process wrapper is built without the normal rules_rust
+ # process wrapper. On Windows nightly toolchains that expose rust-lld, the
+ # C++ toolchain path currently resolves to clang++ while still emitting
+ # MSVC-style arguments, so prefer rust-lld for this one bootstrap binary
+ # instead of switching all Rust actions over.
+ use_bootstrap_rust_linker = (
+ # Windows MSVC Rust targets can inherit a GNU-flavored C++ linker path
+ # (`clang++`) alongside MSVC-style arguments. Prefer the toolchain linker
+ # there so both exec helpers and ordinary MSVC Rust targets link through
+ # the Windows direct linker instead.
+ use_windows_rust_linker = (
+ toolchain.target_os.startswith("windows") and
+ toolchain.linker != None and
+ hasattr(ctx.executable, "_bootstrap_process_wrapper") and
+ not ctx.executable._process_wrapper
+ toolchain.target_abi == "msvc" and
+ toolchain.linker != None
+ )
+
+ if not ld or toolchain.linker_preference == "rust" or use_bootstrap_rust_linker:
+ if not ld or toolchain.linker_preference == "rust" or use_windows_rust_linker:
ld = toolchain.linker.path
ld_is_direct_driver = toolchain.linker_type == "direct"