pass cc shared libs as order-only to rustc

The library file for a cc_shared_library dependency is added to the linkFlags of the rustc compilation action, but no explicit dependency was made on it from a Ninja perspective if a TOC was also present. This change adds the explicit dependency on the library file whether or not a TOC is present.

Test: m crosvm
Bug: 275416061
Change-Id: I625b62762d9ba7b4fd2b8362285528e47f728dd4

rust/builder.go

@@ -218,6 +218,7 @@ func transformSrctoCrate(ctx ModuleContext, main android.Path, deps PathDeps, fl
 
 	var inputs android.Paths
 	var implicits android.Paths
+	var orderOnly android.Paths
 	var output buildOutput
 	var rustcFlags, linkFlags []string
 	var implicitOutputs android.WritablePaths
@@ -285,6 +286,8 @@ func transformSrctoCrate(ctx ModuleContext, main android.Path, deps PathDeps, fl
 	implicits = append(implicits, deps.CrtBegin...)
 	implicits = append(implicits, deps.CrtEnd...)
 
+	orderOnly = append(orderOnly, deps.SharedLibs...)
+
 	if len(deps.SrcDeps) > 0 {
 		moduleGenDir := ctx.RustModule().compiler.CargoOutDir()
 		var outputs android.WritablePaths
@@ -331,6 +334,7 @@ func transformSrctoCrate(ctx ModuleContext, main android.Path, deps PathDeps, fl
 			ImplicitOutputs: nil,
 			Inputs:          inputs,
 			Implicits:       implicits,
+			OrderOnly:       orderOnly,
 			Args: map[string]string{
 				"rustcFlags":  strings.Join(rustcFlags, " "),
 				"libFlags":    strings.Join(libFlags, " "),
@@ -349,6 +353,7 @@ func transformSrctoCrate(ctx ModuleContext, main android.Path, deps PathDeps, fl
 		ImplicitOutputs: implicitOutputs,
 		Inputs:          inputs,
 		Implicits:       implicits,
+		OrderOnly:       orderOnly,
 		Args: map[string]string{
 			"rustcFlags": strings.Join(rustcFlags, " "),
 			"linkFlags":  strings.Join(linkFlags, " "),
@@ -367,6 +372,7 @@ func transformSrctoCrate(ctx ModuleContext, main android.Path, deps PathDeps, fl
 			Output:      kytheFile,
 			Inputs:      inputs,
 			Implicits:   implicits,
+			OrderOnly:   orderOnly,
 			Args: map[string]string{
 				"rustcFlags": strings.Join(rustcFlags, " "),
 				"linkFlags":  strings.Join(linkFlags, " "),

rust/rust.go

@@ -1413,7 +1413,7 @@ func (mod *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 
 	depPaths.RLibs = append(depPaths.RLibs, rlibDepFiles...)
 	depPaths.DyLibs = append(depPaths.DyLibs, dylibDepFiles...)
-	depPaths.SharedLibs = append(depPaths.SharedLibs, sharedLibDepFiles...)
+	depPaths.SharedLibs = append(depPaths.SharedLibs, sharedLibFiles...)
 	depPaths.SharedLibDeps = append(depPaths.SharedLibDeps, sharedLibDepFiles...)
 	depPaths.StaticLibs = append(depPaths.StaticLibs, staticLibDepFiles...)
 	depPaths.ProcMacros = append(depPaths.ProcMacros, procMacroDepFiles...)

rust/rust_test.go

@@ -209,6 +209,10 @@ func TestLinkPathFromFilePath(t *testing.T) {
 // Test to make sure dependencies are being picked up correctly.
 func TestDepsTracking(t *testing.T) {
 	ctx := testRust(t, `
+		cc_library {
+			host_supported: true,
+			name: "cc_stubs_dep",
+		}
 		rust_ffi_host_static {
 			name: "libstatic",
 			srcs: ["foo.rs"],
@@ -235,6 +239,7 @@ func TestDepsTracking(t *testing.T) {
 			crate_name: "rlib",
 			static_libs: ["libstatic"],
 			whole_static_libs: ["libwholestatic"],
+			shared_libs: ["cc_stubs_dep"],
 		}
 		rust_proc_macro {
 			name: "libpm",
@@ -279,6 +284,17 @@ func TestDepsTracking(t *testing.T) {
 		t.Errorf("-lstatic flag not being passed to rustc for static library %#v", rustc.Args["rustcFlags"])
 	}
 
+	if !strings.Contains(rustc.Args["linkFlags"], "cc_stubs_dep.so") {
+		t.Errorf("shared cc_library not being passed to rustc linkFlags %#v", rustc.Args["linkFlags"])
+	}
+
+	if !android.SuffixInList(rustc.OrderOnly.Strings(), "cc_stubs_dep.so") {
+		t.Errorf("shared cc dep not being passed as order-only to rustc %#v", rustc.OrderOnly.Strings())
+	}
+
+	if !android.SuffixInList(rustc.Implicits.Strings(), "cc_stubs_dep.so.toc") {
+		t.Errorf("shared cc dep TOC not being passed as implicit to rustc %#v", rustc.Implicits.Strings())
+	}
 }
 
 func TestSourceProviderDeps(t *testing.T) {
@@ -371,7 +387,6 @@ func TestSourceProviderDeps(t *testing.T) {
 	if !android.InList("libbindings.rlib-std", libprocmacroMod.Properties.AndroidMkRlibs) {
 		t.Errorf("bindgen dependency not detected as a rlib dependency (dependency missing from AndroidMkRlibs)")
 	}
-
 }
 
 func TestSourceProviderTargetMismatch(t *testing.T) {