pkg/build: add bb-addr-map to clang builds

Author: tarasmadan

pkg/build/linux.go

@@ -206,7 +206,7 @@ func LinuxMakeArgs(target *targets.Target, compiler, linker, ccache, buildDir st
 	}
 	// The standard way to build Linux with clang is to pass LLVM=1 instead of CC= and LD=.
 	if compiler == targets.DefaultLLVMCompiler && (linker == "" || linker == targets.DefaultLLVMLinker) {
-		args = append(args, "LLVM=1")
+		args = append(args, "LLVM=1", "LLVM_IAS=1", "KCFLAGS=-mllvm -enable-bb-addr-map")
 	} else {
 		if compiler != "" {
 			args = append(args, "CC="+compiler)

pkg/build/make_test.go

@@ -0,0 +1,20 @@
+// Copyright 2026 syzkaller project authors. All rights reserved.
+// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+package build
+
+import (
+	"testing"
+
+	"github.com/google/syzkaller/sys/targets"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestLinuxMakeArgsLLVM(t *testing.T) {
+	target := targets.Get(targets.Linux, targets.AMD64)
+	args := LinuxMakeArgs(target, "clang", "ld.lld", "", "", 1)
+
+	assert.Contains(t, args, "LLVM=1")
+	assert.Contains(t, args, "LLVM_IAS=1")
+	assert.Contains(t, args, "KCFLAGS=-mllvm -enable-bb-addr-map")
+}