Statically link crate_universe for MSVC (bazelbuild#4031)

closes bazelbuild#3833

Author: UebelAndre

.bazelci/presubmit.yml

@@ -576,6 +576,14 @@ tasks:
       - "//..."
     test_targets:
       - "//..."
+  cu_integ_cargo_workspace_windows:
+    name: Crate Universe - cargo_workspace
+    platform: windows
+    working_directory: crate_universe/tests/integration/cargo_workspace
+    build_targets:
+      - "//..."
+    test_targets:
+      - "//..."
 
   # --- cargo_conditional_deps ---
   cu_integ_cargo_conditional_deps_ubuntu2204:

crate_universe/BUILD.bazel

@@ -57,6 +57,10 @@ filegroup(
     visibility = ["//crate_universe:__subpackages__"],
 )
 
+MSVC_RUSTC_FLAGS = [
+    "-Ctarget-feature=+crt-static",
+]
+
 rust_library(
     name = "cargo_bazel",
     srcs = glob(
@@ -67,6 +71,12 @@ rust_library(
     compile_data = [":rust_data"],
     edition = "2021",
     proc_macro_deps = all_crate_deps(proc_macro = True),
+    rustc_flags = select({
+        "//rust/platform:aarch64-pc-windows-msvc": MSVC_RUSTC_FLAGS,
+        "//rust/platform:i686-pc-windows-msvc": MSVC_RUSTC_FLAGS,
+        "//rust/platform:x86_64-pc-windows-msvc": MSVC_RUSTC_FLAGS,
+        "//conditions:default": [],
+    }),
     # This target embeds additional, stamping related information (see
     # https://docs.bazel.build/versions/main/user-manual.html#workspace_status
     # for more information). Set stamp = -1 to indicate that it should respect

crate_universe/Cargo.toml

@@ -60,6 +60,9 @@ repository = "https://github.com/bazelbuild/rules_rust"
 cargo = []
 default = ["cargo"]
 
+[target.'cfg(all(target_os = "windows", target_env = "msvc"))']
+rustflags=["-Ctarget-feature=+crt-static"]
+
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]