propagate additional inputs from native dependencies

rust/private/clippy.bzl

@@ -70,6 +70,7 @@ def _clippy_aspect_impl(target, ctx):
         ctx.rule.files,
         toolchain,
         cc_toolchain,
+        crate_type,
         crate_info,
         dep_info,
         build_info,

rust/private/rustc.bzl

@@ -268,6 +268,7 @@ def collect_inputs(
         files,
         toolchain,
         cc_toolchain,
+        crate_type,
         crate_info,
         dep_info,
         build_info):
@@ -279,6 +280,7 @@ def collect_inputs(
         files (list): A list of all inputs (`ctx.files`).
         toolchain (rust_toolchain): The current `rust_toolchain`.
         cc_toolchain (CcToolchainInfo): The current `cc_toolchain`.
+        crate_type (str): Crate type of the current target.
         crate_info (CrateInfo): The Crate information of the crate to process build scripts for.
         dep_info (DepInfo): The target Crate's dependency information.
         build_info (BuildInfo): The target Crate's build settings.
@@ -290,6 +292,18 @@ def collect_inputs(
 
     linker_depset = cc_toolchain.all_files
 
+    # Pass linker additional inputs (e.g., linker scripts) only for linking-like
+    # actions, not for example where the output is rlib. This avoids quadratic
+    # behavior where transitive noncrates are flattened on each transitive
+    # rust_library dependency.
+    additional_transitive_inputs = []
+    if crate_type == "bin":
+        additional_transitive_inputs = [
+            additional_input
+            for linker_input in dep_info.transitive_noncrates.to_list()
+            for additional_input in linker_input.additional_inputs
+        ]
+
     compile_inputs = depset(
         getattr(files, "data", []) +
         [toolchain.rustc] +
@@ -303,6 +317,7 @@ def collect_inputs(
             linker_depset,
             crate_info.srcs,
             dep_info.transitive_libs,
+            depset(additional_transitive_inputs),
             crate_info.compile_data,
         ],
     )
@@ -555,6 +570,7 @@ def rustc_compile_action(
         ctx.files,
         toolchain,
         cc_toolchain,
+        crate_type,
         crate_info,
         dep_info,
         build_info,

test/unit/native_deps/dynamic.lds

@@ -0,0 +1,2 @@
+{
+};

test/unit/native_deps/native_deps_test.bzl

@@ -293,6 +293,35 @@ def _linkopts_test():
         target_under_test = ":linkopts_rust_bin",
     )
 
+def _additional_deps_test_impl(ctx):
+    env = analysistest.begin(ctx)
+    tut = analysistest.target_under_test(env)
+    action = tut.actions[0]
+    additional_inputs = [inp.basename for inp in action.inputs.to_list()]
+    asserts.true(env, "dynamic.lds" in additional_inputs)
+    return analysistest.end(env)
+
+additional_deps_test = analysistest.make(_additional_deps_test_impl)
+
+def _additional_deps_test():
+    rust_binary(
+        name = "additional_deps_rust_bin",
+        srcs = ["bin_using_native_dep.rs"],
+        deps = [":additional_deps_cc"],
+    )
+
+    cc_library(
+        name = "additional_deps_cc",
+        srcs = ["native_dep.cc"],
+        linkopts = ["-L$(location :dynamic.lds)"],
+        deps = [":dynamic.lds"],
+    )
+
+    additional_deps_test(
+        name = "additional_deps_test",
+        target_under_test = ":additional_deps_rust_bin",
+    )
+
 def native_deps_test_suite(name):
     """Entry-point macro called from the BUILD file.
 
@@ -301,6 +330,7 @@ def native_deps_test_suite(name):
     """
     _native_dep_test()
     _linkopts_test()
+    _additional_deps_test()
 
     native.test_suite(
         name = name,
@@ -313,5 +343,6 @@ def native_deps_test_suite(name):
             ":bin_has_native_dep_and_alwayslink_test",
             ":cdylib_has_native_dep_and_alwayslink_test",
             ":native_linkopts_propagate_test",
+            ":additional_deps_test",
         ],
     )