Merge "Generate .build-id directory tree after every build." into main

ui/build/Android.bp

@@ -36,6 +36,7 @@ bootstrap_go_package {
         "blueprint-bootstrap",
         "blueprint-microfactory",
         "soong-android",
+        "soong-elf",
         "soong-finder",
         "soong-remoteexec",
         "soong-shared",

ui/build/build.go

@@ -22,6 +22,7 @@ import (
 	"sync"
 	"text/template"
 
+	"android/soong/elf"
 	"android/soong/ui/metrics"
 )
 
@@ -344,6 +345,7 @@ func Build(ctx Context, config Config) {
 			installCleanIfNecessary(ctx, config)
 		}
 		runNinjaForBuild(ctx, config)
+		updateBuildIdDir(ctx, config)
 	}
 
 	if what&RunDistActions != 0 {
@@ -351,6 +353,16 @@ func Build(ctx Context, config Config) {
 	}
 }
 
+func updateBuildIdDir(ctx Context, config Config) {
+	ctx.BeginTrace(metrics.RunShutdownTool, "update_build_id_dir")
+	defer ctx.EndTrace()
+
+	symbolsDir := filepath.Join(config.ProductOut(), "symbols")
+	if err := elf.UpdateBuildIdDir(symbolsDir); err != nil {
+		ctx.Printf("failed to update %s/.build-id: %v", symbolsDir, err)
+	}
+}
+
 func evaluateWhatToRun(config Config, verboseln func(v ...interface{})) int {
 	//evaluate what to run
 	what := 0