diff --git a/cmd/llcppcfg/llcppcfg.go b/cmd/llcppcfg/llcppcfg.go
index 0c5a7a0a..f680dcce 100644
--- a/cmd/llcppcfg/llcppcfg.go
+++ b/cmd/llcppcfg/llcppcfg.go
@@ -47,7 +47,7 @@ func main() {
 	if tab {
 		flag |= llcppgcfg.WithTab
 	}
-	buf, err := llcppgcfg.GenCfg(name, flag, exts, excludeSubdirs)
+	buf, err := llcppgcfg.GenCfg(llcppgcfg.NewGenConfig(name, flag, exts, excludeSubdirs))
 	if err != nil {
 		log.Fatal(err)
 	}
diff --git a/cmd/llcppcfg/llcppgcfg/cfg.go b/cmd/llcppcfg/llcppgcfg/cfg.go
index ad2bc558..7af642bd 100644
--- a/cmd/llcppcfg/llcppgcfg/cfg.go
+++ b/cmd/llcppcfg/llcppgcfg/cfg.go
@@ -3,6 +3,7 @@ package llcppgcfg
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io/fs"
 	"log"
@@ -15,6 +16,17 @@ import (
 	"github.com/goplus/llcppg/llcppg"
 )
 
+type GenConfig struct {
+	name           string
+	flag           FlagMode
+	exts           []string
+	excludeSubdirs []string
+}
+
+func NewGenConfig(name string, flag FlagMode, exts, excludeSubdirs []string) *GenConfig {
+	return &GenConfig{name: name, flag: flag, exts: exts, excludeSubdirs: excludeSubdirs}
+}
+
 type llcppCfgKey string
 
 const (
@@ -104,9 +116,9 @@ func getClangArgs(cflags string, relpath string) []string {
 	return args
 }
 
-func parseFileEntry(cflags, trimCflag, path string, d fs.DirEntry, exts []string, excludeSubdirs []string) *ObjFile {
+func parseFileEntry(cflags, trimCflag, path string, d fs.DirEntry, exts []string, excludeSubdirs []string) (*ObjFile, error) {
 	if d.IsDir() || strings.HasPrefix(d.Name(), ".") {
-		return nil
+		return nil, errors.New("invalid file entry")
 	}
 	idx := len(exts)
 	for i, ext := range exts {
@@ -116,28 +128,28 @@ func parseFileEntry(cflags, trimCflag, path string, d fs.DirEntry, exts []string
 		}
 	}
 	if idx == len(exts) {
-		return nil
+		return nil, errors.New("invalid file ext")
 	}
 	relPath, err := filepath.Rel(trimCflag, path)
 	if err != nil {
 		relPath = path
 	}
 	if isExcludeDir(relPath, excludeSubdirs) {
-		return nil
+		return nil, errors.New("file in excluded directory")
 	}
 	args := getClangArgs(cflags, relPath)
 	clangCmd := cmdout.NewExecCommand("clang", args...)
 	outString, err := cmdout.GetOut(clangCmd, trimCflag)
 	if err != nil {
 		log.Println(outString)
-		return nil
+		return NewObjFile(relPath, relPath), errors.New(outString)
 	}
 	outString = strings.ReplaceAll(outString, "\\\n", "\n")
 	fields := strings.Fields(outString)
 	lines, objFileStr := findDepSlice(fields)
 	objFile := NewObjFileString(objFileStr)
 	objFile.Deps = append(objFile.Deps, lines...)
-	return objFile
+	return objFile, nil
 }
 
 func parseCFlagsEntry(cflags, cflag string, exts []string, excludeSubdirs []string) *CflagEntry {
@@ -151,11 +163,18 @@ func parseCFlagsEntry(cflags, cflag string, exts []string, excludeSubdirs []stri
 	var cflagEntry CflagEntry
 	cflagEntry.Include = trimCflag
 	cflagEntry.ObjFiles = make([]*ObjFile, 0)
+	cflagEntry.InvalidObjFiles = make([]*ObjFile, 0)
 	err := filepath.WalkDir(trimCflag, func(path string, d fs.DirEntry, err error) error {
 		if err != nil {
 			return err
 		}
-		pObjFile := parseFileEntry(cflags, trimCflag, path, d, exts, excludeSubdirs)
+		pObjFile, err := parseFileEntry(cflags, trimCflag, path, d, exts, excludeSubdirs)
+		if err != nil {
+			if pObjFile != nil {
+				cflagEntry.InvalidObjFiles = append(cflagEntry.InvalidObjFiles, pObjFile)
+			}
+			return nil
+		}
 		if pObjFile != nil {
 			cflagEntry.ObjFiles = append(cflagEntry.ObjFiles, pObjFile)
 		}
@@ -204,19 +223,17 @@ func NormalizePackageName(name string) string {
 	return strings.Join(fields, "_")
 }
 
-func GenCfg(name string, flag FlagMode, exts []string, excludeSubdirs []string) (*bytes.Buffer, error) {
-	if len(name) == 0 {
+func GenCfg(genCfg *GenConfig) (*bytes.Buffer, error) {
+	if len(genCfg.name) == 0 {
 		return nil, newEmptyStringError("name")
 	}
-	cfg := NewLLCppgConfig(name, flag)
-	expandCFlags := ExpandName(name, "", cfgCflagsKey)
-	sortIncludes(expandCFlags, cfg, exts, excludeSubdirs)
-
+	cfg := NewLLCppgConfig(genCfg.name, genCfg.flag)
+	expandCFlags := ExpandName(genCfg.name, "", cfgCflagsKey)
+	sortIncludes(expandCFlags, cfg, genCfg.exts, genCfg.excludeSubdirs)
 	cfg.Name = NormalizePackageName(cfg.Name)
-
 	buf := bytes.NewBuffer([]byte{})
 	jsonEncoder := json.NewEncoder(buf)
-	if flag&WithTab != 0 {
+	if genCfg.flag&WithTab != 0 {
 		jsonEncoder.SetIndent("", "\t")
 	}
 	err := jsonEncoder.Encode(cfg)
diff --git a/cmd/llcppcfg/llcppgcfg/cfg_test.go b/cmd/llcppcfg/llcppgcfg/cfg_test.go
index 89071500..f3d7612b 100644
--- a/cmd/llcppcfg/llcppgcfg/cfg_test.go
+++ b/cmd/llcppcfg/llcppgcfg/cfg_test.go
@@ -293,7 +293,7 @@ func Test_parseFileEntry(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got := parseFileEntry(tt.args.cflags, tt.args.trimStr, tt.args.path, tt.args.d, tt.args.exts, tt.args.excludeSubdirs)
+			got, _ := parseFileEntry(tt.args.cflags, tt.args.trimStr, tt.args.path, tt.args.d, tt.args.exts, tt.args.excludeSubdirs)
 			if tt.want != nil && got != nil && !got.IsEqual(tt.want) {
 				t.Errorf("parseFileEntry() = %v, want %v", got, tt.want)
 			}
@@ -643,7 +643,7 @@ func TestGenCfg(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got, err := GenCfg(tt.args.name, tt.args.flag, tt.args.exts, tt.args.excludeSubdirs)
+			got, err := GenCfg(NewGenConfig(tt.args.name, tt.args.flag, tt.args.exts, tt.args.excludeSubdirs))
 			if (err != nil) != tt.wantErr {
 				t.Errorf("GenCfg() error = %v, wantErr %v", err, tt.wantErr)
 				return
diff --git a/cmd/llcppcfg/llcppgcfg/types.go b/cmd/llcppcfg/llcppgcfg/types.go
index 7b08caf9..337aec49 100644
--- a/cmd/llcppcfg/llcppgcfg/types.go
+++ b/cmd/llcppcfg/llcppgcfg/types.go
@@ -75,6 +75,17 @@ func (p *IncludeList) AddCflagEntry(index int, entry *CflagEntry) {
 			p.AddIncludeForObjFile(objFile, index)
 		}
 	}
+	lenInvalidObjFiles := len(entry.InvalidObjFiles)
+	if lenInvalidObjFiles > 0 {
+		fmt.Println("Invlid header files:")
+		for idx, objFile := range entry.InvalidObjFiles {
+			if idx < lenInvalidObjFiles-1 {
+				fmt.Printf("\t\t%q,\n", objFile.HFile)
+			} else {
+				fmt.Printf("\t\t%q\n", objFile.HFile)
+			}
+		}
+	}
 }
 
 func (p *IncludeList) AddIncludeForObjFile(objFile *ObjFile, index int) {
@@ -88,8 +99,9 @@ func (p *IncludeList) AddIncludeForObjFile(objFile *ObjFile, index int) {
 }
 
 type CflagEntry struct {
-	Include  string
-	ObjFiles []*ObjFile
+	Include         string
+	ObjFiles        []*ObjFile
+	InvalidObjFiles []*ObjFile
 }
 
 func (c *CflagEntry) IsEmpty() bool {