Fix transitive whole_static_libs on prebuilt static libraries

whole_static_libs on static library usually uses the .o files from
the dependency, but on a prebuilt static library has to use the .a file.
whole_static_libs on a static library that itself has whole_static_libs
on a prebuilt static library also needs to use the .a file transitively.

Test: TestWholeStaticLibPrebuilts
Change-Id: I9d4aabf72be0941b461a72e610f2b28287251cb2

cc/cc.go

@@ -2795,6 +2795,8 @@ func (c *Module) depsToPaths(ctx android.ModuleContext) PathDeps {
 						// dependency.
 						depPaths.WholeStaticLibsFromPrebuilts = append(depPaths.WholeStaticLibsFromPrebuilts, linkFile.Path())
 					}
+					depPaths.WholeStaticLibsFromPrebuilts = append(depPaths.WholeStaticLibsFromPrebuilts,
+						staticLibraryInfo.WholeStaticLibsFromPrebuilts...)
 				} else {
 					switch libDepTag.Order {
 					case earlyLibraryDependency:

cc/library.go

@@ -586,7 +586,8 @@ type libraryDecorator struct {
 	stripper         Stripper
 
 	// For whole_static_libs
-	objects Objects
+	objects                      Objects
+	wholeStaticLibsFromPrebuilts android.Paths
 
 	// Uses the module's name if empty, but can be overridden. Does not include
 	// shlib suffix.
@@ -1343,6 +1344,7 @@ func (library *libraryDecorator) linkStatic(ctx ModuleContext,
 
 	library.objects = deps.WholeStaticLibObjs.Copy()
 	library.objects = library.objects.Append(objs)
+	library.wholeStaticLibsFromPrebuilts = android.CopyOfPaths(deps.WholeStaticLibsFromPrebuilts)
 
 	fileName := ctx.ModuleName() + staticLibraryExtension
 	outputFile := android.PathForModuleOut(ctx, fileName)
@@ -1368,9 +1370,10 @@ func (library *libraryDecorator) linkStatic(ctx ModuleContext,
 
 	if library.static() {
 		ctx.SetProvider(StaticLibraryInfoProvider, StaticLibraryInfo{
-			StaticLibrary: outputFile,
+			StaticLibrary:                outputFile,
-			ReuseObjects:  library.reuseObjects,
+			ReuseObjects:                 library.reuseObjects,
-			Objects:       library.objects,
+			Objects:                      library.objects,
+			WholeStaticLibsFromPrebuilts: library.wholeStaticLibsFromPrebuilts,
 
 			TransitiveStaticLibrariesForOrdering: android.NewDepSetBuilder(android.TOPOLOGICAL).
 				Direct(outputFile).

cc/library_test.go

@@ -379,3 +379,77 @@ cc_library_shared {
 	gotFlags := entries.EntryMap["LOCAL_EXPORT_CFLAGS"]
 	android.AssertDeepEquals(t, "androidmk exported cflags", expectedFlags, gotFlags)
 }
+
+func TestWholeStaticLibPrebuilts(t *testing.T) {
+	result := PrepareForIntegrationTestWithCc.RunTestWithBp(t, `
+		cc_prebuilt_library_static {
+			name: "libprebuilt",
+			srcs: ["foo.a"],
+		}
+
+		cc_library_static {
+			name: "libdirect",
+			whole_static_libs: ["libprebuilt"],
+		}
+
+		cc_library_static {
+			name: "libtransitive",
+			whole_static_libs: ["libdirect"],
+		}
+
+		cc_library_static {
+			name: "libdirect_with_srcs",
+			srcs: ["bar.c"],
+			whole_static_libs: ["libprebuilt"],
+		}
+
+		cc_library_static {
+			name: "libtransitive_with_srcs",
+			srcs: ["baz.c"],
+			whole_static_libs: ["libdirect_with_srcs"],
+		}
+	`)
+
+	libdirect := result.ModuleForTests("libdirect", "android_arm64_armv8-a_static").Rule("arWithLibs")
+	libtransitive := result.ModuleForTests("libtransitive", "android_arm64_armv8-a_static").Rule("arWithLibs")
+
+	libdirectWithSrcs := result.ModuleForTests("libdirect_with_srcs", "android_arm64_armv8-a_static").Rule("arWithLibs")
+	libtransitiveWithSrcs := result.ModuleForTests("libtransitive_with_srcs", "android_arm64_armv8-a_static").Rule("arWithLibs")
+
+	barObj := result.ModuleForTests("libdirect_with_srcs", "android_arm64_armv8-a_static").Rule("cc")
+	bazObj := result.ModuleForTests("libtransitive_with_srcs", "android_arm64_armv8-a_static").Rule("cc")
+
+	android.AssertStringListContains(t, "missing dependency on foo.a",
+		libdirect.Inputs.Strings(), "foo.a")
+	android.AssertStringDoesContain(t, "missing flag for foo.a",
+		libdirect.Args["arLibs"], "foo.a")
+
+	android.AssertStringListContains(t, "missing dependency on foo.a",
+		libtransitive.Inputs.Strings(), "foo.a")
+	android.AssertStringDoesContain(t, "missing flag for foo.a",
+		libtransitive.Args["arLibs"], "foo.a")
+
+	android.AssertStringListContains(t, "missing dependency on foo.a",
+		libdirectWithSrcs.Inputs.Strings(), "foo.a")
+	android.AssertStringDoesContain(t, "missing flag for foo.a",
+		libdirectWithSrcs.Args["arLibs"], "foo.a")
+	android.AssertStringListContains(t, "missing dependency on bar.o",
+		libdirectWithSrcs.Inputs.Strings(), barObj.Output.String())
+	android.AssertStringDoesContain(t, "missing flag for bar.o",
+		libdirectWithSrcs.Args["arObjs"], barObj.Output.String())
+
+	android.AssertStringListContains(t, "missing dependency on foo.a",
+		libtransitiveWithSrcs.Inputs.Strings(), "foo.a")
+	android.AssertStringDoesContain(t, "missing flag for foo.a",
+		libtransitiveWithSrcs.Args["arLibs"], "foo.a")
+
+	android.AssertStringListContains(t, "missing dependency on bar.o",
+		libtransitiveWithSrcs.Inputs.Strings(), barObj.Output.String())
+	android.AssertStringDoesContain(t, "missing flag for bar.o",
+		libtransitiveWithSrcs.Args["arObjs"], barObj.Output.String())
+
+	android.AssertStringListContains(t, "missing dependency on baz.o",
+		libtransitiveWithSrcs.Inputs.Strings(), bazObj.Output.String())
+	android.AssertStringDoesContain(t, "missing flag for baz.o",
+		libtransitiveWithSrcs.Args["arObjs"], bazObj.Output.String())
+}

cc/linkable.go

@@ -352,6 +352,11 @@ type StaticLibraryInfo struct {
 	Objects       Objects
 	ReuseObjects  Objects
 
+	// A static library may contain prebuilt static libraries included with whole_static_libs
+	// that won't appear in Objects.  They are transitively available in
+	// WholeStaticLibsFromPrebuilts.
+	WholeStaticLibsFromPrebuilts android.Paths
+
 	// This isn't the actual transitive DepSet, shared library dependencies have been
 	// converted into static library analogues.  It is only used to order the static
 	// library dependencies that were specified for the current module.