diff --git a/_xtool/internal/clang/clang.go b/_xtool/internal/clang/clang.go
index 19499967..d1faf144 100644
--- a/_xtool/internal/clang/clang.go
+++ b/_xtool/internal/clang/clang.go
@@ -2,11 +2,15 @@ package clang
 
 import (
 	"errors"
+	"os/exec"
 	"unsafe"
 
 	"github.com/goplus/lib/c"
 	"github.com/goplus/lib/c/clang"
-	"github.com/goplus/llcppg/_xtool/internal/clangtool"
+)
+
+const (
+	LLGoPackage = "link: -L$(llvm-config --libdir) -lclang; -lclang"
 )
 
 type Config struct {
@@ -26,8 +30,14 @@ const TEMP_FILE = "temp.h"
 func CreateTranslationUnit(config *Config) (*clang.Index, *clang.TranslationUnit, error) {
 	// default use the c/c++ standard of clang; c:gnu17 c++:gnu++17
 	// https://clang.llvm.org/docs/CommandGuide/clang.html
-	allArgs := clangtool.WithSysRoot(append(defaultArgs(config.IsCpp), config.Args...))
 
+	executableName := "clang"
+	path, err := exec.LookPath(executableName)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	allArgs := append(append([]string{path}, defaultArgs(config.IsCpp)...), config.Args...)
 	cArgs := make([]*c.Char, len(allArgs))
 	for i, arg := range allArgs {
 		cArgs[i] = c.AllocaCStr(arg)
@@ -41,7 +51,7 @@ func CreateTranslationUnit(config *Config) (*clang.Index, *clang.TranslationUnit
 	}
 
 	var unit *clang.TranslationUnit
-
+	var code ErrorCode
 	if config.Temp {
 		content := c.AllocaCStr(config.File)
 		tempFile := &clang.UnsavedFile{
@@ -49,24 +59,30 @@ func CreateTranslationUnit(config *Config) (*clang.Index, *clang.TranslationUnit
 			Contents: content,
 			Length:   c.Ulong(c.Strlen(content)),
 		}
-
-		unit = index.ParseTranslationUnit(
+		code = ParseTranslationUnit2FullArgv(index,
 			tempFile.Filename,
 			unsafe.SliceData(cArgs), c.Int(len(cArgs)),
 			tempFile, 1,
 			clang.DetailedPreprocessingRecord,
+			&unit,
 		)
-
 	} else {
+
 		cFile := c.AllocaCStr(config.File)
-		unit = index.ParseTranslationUnit(
+		code = ParseTranslationUnit2FullArgv(index,
 			cFile,
 			unsafe.SliceData(cArgs), c.Int(len(cArgs)),
 			nil, 0,
 			clang.DetailedPreprocessingRecord,
+			&unit,
 		)
 	}
 
+	if code != Error_Success {
+		c.Printf(c.Str("code: %d\n"), code)
+		return nil, nil, errors.New("failed to parse translation unit")
+	}
+
 	if unit == nil {
 		return nil, nil, errors.New("failed to parse translation unit")
 	}
@@ -114,3 +130,43 @@ func defaultArgs(isCpp bool) []string {
 	}
 	return args
 }
+
+// CINDEX_LINKAGE CXTranslationUnit clang_parseTranslationUnit(CXIndex CIdx, const char *source_filename,
+// 	const char *const *command_line_args,
+// 	int num_command_line_args,
+// 	struct CXUnsavedFile *unsaved_files,
+// 	unsigned num_unsaved_files, unsigned options);
+
+/**
+ * Same as \c clang_parseTranslationUnit2, but returns
+ * the \c CXTranslationUnit instead of an error code.  In case of an error this
+ * routine returns a \c NULL \c CXTranslationUnit, without further detailed
+ * error codes.
+ */
+//go:linkname ParseTranslationUnit C.clang_parseTranslationUnit
+func ParseTranslationUnit(index *clang.Index, sourceFilename *c.Char, commandLineArgs **c.Char, numCommandLineArgs c.Int,
+	unsavedFiles *clang.UnsavedFile, numUnsavedFiles c.Uint, options c.Uint) *clang.TranslationUnit
+
+/**
+ * Same as clang_parseTranslationUnit2 but requires a full command line
+ * for \c command_line_args including argv[0]. This is useful if the standard
+ * library paths are relative to the binary.
+ */
+// CINDEX_LINKAGE enum CXErrorCode
+// clang_parseTranslationUnit2FullArgv(CXIndex CIdx, const char *source_filename, const char *const *command_line_args,
+//                                     int num_command_line_args, struct CXUnsavedFile *unsaved_files,
+//                                     unsigned num_unsaved_files, unsigned options, CXTranslationUnit *out_TU);
+
+type ErrorCode int
+
+const (
+	Error_Success          = 0
+	Error_Failure          = 1
+	Error_Crashed          = 2
+	Error_InvalidArguments = 3
+	Error_ASTReadError     = 4
+)
+
+//go:linkname ParseTranslationUnit2FullArgv C.clang_parseTranslationUnit2FullArgv
+func ParseTranslationUnit2FullArgv(index *clang.Index, sourceFilename *c.Char, commandLineArgs **c.Char, numCommandLineArgs c.Int,
+	unsavedFiles *clang.UnsavedFile, numUnsavedFiles c.Uint, options c.Uint, out_TU **clang.TranslationUnit) ErrorCode