diff --git a/_xtool/llcppsymg/internal/symg/symg_test.go b/_xtool/llcppsymg/internal/symg/symg_test.go
index 35eb275e..48f52111 100644
--- a/_xtool/llcppsymg/internal/symg/symg_test.go
+++ b/_xtool/llcppsymg/internal/symg/symg_test.go
@@ -1,6 +1,7 @@
 package symg_test
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"log"
@@ -13,8 +14,6 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/goplus/llcppg/_xtool/internal/clangtool"
-	"github.com/goplus/llcppg/_xtool/internal/header"
 	"github.com/goplus/llcppg/_xtool/internal/symbol"
 	"github.com/goplus/llcppg/_xtool/llcppsymg/internal/symg"
 	llcppg "github.com/goplus/llcppg/config"
@@ -272,6 +271,27 @@ class INIReader {
 				},
 			},
 		},
+
+		{
+			name: "Non-exported functions",
+			content: `
+				void Foo_Bar();
+				#define private static
+				static void Foo_Bar_Private();
+				private
+				void Foo_Bar_Private2();
+
+			`,
+			isCpp: false,
+			expect: []*llcppg.SymbolInfo{
+				{
+					Go:     "FooBar",
+					CPP:    "Foo_Bar()",
+					Mangle: "Foo_Bar",
+				},
+			},
+		},
+
 		{
 			name: "InvalidReceiver PointerLevel > 1",
 			content: `
@@ -379,110 +399,41 @@ class INIReader {
 }
 
 func TestGen(t *testing.T) {
-	gen := false
 	testCases := []struct {
-		name       string
-		path       string
-		libSymbols []string
+		name string
+		path string
 	}{
 		{
 			name: "c",
 			path: "./testdata/c",
-			libSymbols: []string{
-				"Foo_Print",
-				"Foo_ParseWithLength",
-				"Foo_Delete",
-				"Foo_ParseWithSize",
-				"Foo_ignoreFunc",
-				"Foo_Bar",
-				"Foo_ForBar",
-				"Foo_Bar2",
-				"Foo_ForBar2",
-				"Foo_Prefix_BarMethod",
-				"Foo_BarMethod",
-				"Foo_ForBarMethod",
-				"Foo_ReceiverParse",
-				"Foo_FunctionParse",
-				"Foo_ReceiverParse2",
-				"Foo_Receiver2Parse2",
-			},
 		},
 		{
 			name: "cpp",
 			path: "./testdata/cpp",
-			libSymbols: []string{
-				"ZN3FooC1EPKc",
-				"ZN3FooC1EPKcl",
-				"ZN3FooD1Ev",
-				"ZNK3Foo8ParseBarEv",
-				"ZNK3Foo3GetEPKcS1_S1_",
-				"ZN3Foo6HasBarEv",
-			},
 		},
 		{
 			name: "inireader",
 			path: "./testdata/inireader",
-			libSymbols: []string{
-				"ZN9INIReaderC1EPKc",
-				"ZN9INIReaderC1EPKcl",
-				"ZN9INIReaderD1Ev",
-				"ZNK9INIReader10ParseErrorEv",
-				"ZNK9INIReader3GetEPKcS1_S1_",
-				// Check whether private fields are filtered.
-				// If not, the result will certainly not match expect.json.
-				// NOTE(MeteorsLiu): Symbols below this comment must be removed during regeneration.
-				"ZN9INIReader7MakeKeyERKiS1_",
-			},
 		},
 		{
 			name: "lua",
 			path: "./testdata/lua",
-			libSymbols: []string{
-				"lua_error",
-				"lua_next",
-				"lua_concat",
-				"lua_stringtonumber",
-			},
 		},
 		{
 			name: "cjson",
 			path: "./testdata/cjson",
-			libSymbols: []string{
-				"cJSON_Print",
-				"cJSON_ParseWithLength",
-				"cJSON_Delete",
-				// mock multiple symbols
-				"cJSON_Delete",
-			},
 		},
 		{
 			name: "isl",
 			path: "./testdata/isl",
-			libSymbols: []string{
-				"isl_pw_qpolynomial_get_ctx",
-			},
 		},
 		{
 			name: "gpgerror",
 			path: "./testdata/gpgerror",
-			libSymbols: []string{
-				"gpg_strsource",
-				"gpg_strerror_r",
-				"gpg_strerror",
-			},
 		},
 		{
 			name: "include",
 			path: "./testdata/include",
-			libSymbols: []string{
-				"Foo",
-				"Foo_Bar",
-				"Foo_Conf",
-				// only for checking the result of private fields filtering
-				// NOTE(MeteorsLiu): Symbols below this comment must be removed during regeneration.
-				"Foo_Bar_Private",
-				"Foo_Bar_Private2",
-			},
 		},
 	}
 
@@ -496,50 +447,67 @@ func TestGen(t *testing.T) {
 			if err != nil {
 				t.Fatal(err)
 			}
+			libName := filepath.Base(projPath)
+			libDir := filepath.Join(projPath, runtime.GOOS)
 
+			cfg.Libs = fmt.Sprintf("-L%s -l%s", libDir, libName)
 			cfg.CFlags = "-I" + projPath
 
-			tempFile, err := os.CreateTemp("", "combine*.h")
-			if err != nil {
-				t.Fatal(err)
+			gen := false
+
+			if gen {
+				cFiles, hasCpp := scanCFiles(projPath)
+
+				// make sure we have this dir
+				os.MkdirAll(libDir, 0700)
+				staticLibFile := filepath.Join(libDir, "lib"+filepath.Base(projPath)+".a")
+
+				compileCommand := []string{cfg.CFlags, "-o", staticLibFile, "-c"}
+				if !hasCpp {
+					compileCommand = append(compileCommand, "-x", "c")
+				}
+				compileCommand = append(compileCommand, cFiles...)
+
+				cmd := exec.Command("clang++", compileCommand...)
+				res, err := cmd.CombinedOutput()
+				if err != nil {
+					t.Fatal(string(res))
+					return
+				}
 			}
-			defer os.Remove(tempFile.Name())
-			clangtool.ComposeIncludes(cfg.Include, tempFile.Name())
 
-			pkgHfileInfo := header.PkgHfileInfo(&header.Config{
-				Includes: cfg.Include,
-				Args:     strings.Fields(cfg.CFlags),
-				Mix:      false,
+			symbolTable, err := symg.Do(&symg.Config{
+				Libs:         cfg.Libs,
+				CFlags:       cfg.CFlags,
+				Includes:     cfg.Include,
+				Mix:          cfg.Mix,
+				TrimPrefixes: cfg.TrimPrefixes,
+				SymMap:       cfg.SymMap,
+				IsCpp:        cfg.Cplusplus,
+				LibMode:      symbol.ModeStatic,
 			})
-			headerSymbolMap, err := symg.ParseHeaderFile(tempFile.Name(), pkgHfileInfo.CurPkgFiles(), cfg.TrimPrefixes, strings.Fields(cfg.CFlags), cfg.SymMap, cfg.Cplusplus)
+
 			if err != nil {
 				t.Fatal(err)
+				return
 			}
+			expectFile := filepath.Join(projPath, "expect.json")
 
-			// trim to nm symbols
-			var libSymbols []*nm.Symbol
-			for _, symb := range tc.libSymbols {
-				libSymbols = append(libSymbols, &nm.Symbol{Name: addSymbolPrefixUnder(symb, cfg.Cplusplus)})
-			}
-			symbols := symg.GetCommonSymbols(libSymbols, headerSymbolMap)
+			symbolData, err := json.MarshalIndent(&symbolTable, "", "  ")
 			if err != nil {
 				t.Fatal(err)
 			}
-			symbolData, err := json.MarshalIndent(symbols, "", "  ")
+			if gen {
+				os.WriteFile(expectFile, symbolData, 0644)
+				return
+			}
+
+			expectData, err := os.ReadFile(expectFile)
 			if err != nil {
 				t.Fatal(err)
 			}
-			expectFile := filepath.Join(projPath, "expect.json")
-			if gen {
-				os.WriteFile(expectFile, symbolData, 0644)
-			} else {
-				expectData, err := os.ReadFile(expectFile)
-				if err != nil {
-					t.Fatal(err)
-				}
-				if string(symbolData) != string(expectData) {
-					t.Fatalf("expect %s, but got %s", expectData, symbolData)
-				}
+			if !bytes.Equal(expectData, symbolData) {
+				t.Fatalf("expect %s, but got %s", string(expectData), string(symbolData))
 			}
 		})
 	}
@@ -686,3 +654,21 @@ func getDynamicLibExt() string {
 	}
 	return ".so"
 }
+
+// the reason why this function appears here is that llgo dones't support os.ReadDir() currently
+func scanCFiles(dir string) (ret []string, hasCpp bool) {
+	cmd := exec.Command("ls")
+	cmd.Dir = dir
+	res, _ := cmd.Output()
+
+	for _, fileName := range strings.Fields(string(res)) {
+		if strings.HasSuffix(fileName, ".c") || strings.HasSuffix(fileName, ".cpp") {
+			if strings.HasSuffix(fileName, ".cpp") {
+				hasCpp = true
+			}
+			ret = append(ret, filepath.Join(dir, fileName))
+		}
+	}
+
+	return
+}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/c.c b/_xtool/llcppsymg/internal/symg/testdata/c/c.c
new file mode 100644
index 00000000..ed626c7a
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/c/c.c
@@ -0,0 +1,28 @@
+#include "c.h"
+
+char *Foo_Print(const Foo *item) {}
+// config not be a method in llcppg.cfg/symMap
+void Foo_Delete(Foo *item) {}
+// normal function no be a method
+Foo *Foo_ParseWithLength(const char *value, size_t buffer_length) {}
+// only can be a normal function but config be a method,keep output as function
+Foo *Foo_ParseWithSize(const char *value, size_t buffer_length) {}
+
+Foo *Foo_ignoreFunc() {}
+
+// config Foo_ForBar to Bar,so Foo_Bar to Bar__1
+void Foo_Bar() {}
+void Foo_ForBar() {}
+
+void Foo_Prefix_BarMethod(Foo *item) {} // to BarMethod,but follow config the BarMethod,so it need add prefix
+void Foo_BarMethod(Foo *item) {}        // config BarMethod
+void Foo_ForBarMethod(Foo *item) {}     // config BarMethod,so it need add suffix
+
+// first receiver Foo's method,with name 'Parse'
+void Foo_ReceiverParse(Foo *item) {}
+// first function with name 'Parse'
+void Foo_FunctionParse() {}
+// second receiver Foo's method,with name 'Parse', and the next method name is the same,so we need add suffix
+void Foo_ReceiverParse2(Foo *item) {}
+// not same receiver,but same function name,we don't need add suffix
+void Foo_Receiver2Parse2(Foo2 *item) {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/darwin/libc.a b/_xtool/llcppsymg/internal/symg/testdata/c/darwin/libc.a
new file mode 100644
index 00000000..e962ecc2
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/c/darwin/libc.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/c/linux/libc.a b/_xtool/llcppsymg/internal/symg/testdata/c/linux/libc.a
new file mode 100644
index 00000000..a0b90501
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/c/linux/libc.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cjson/cJSON.c b/_xtool/llcppsymg/internal/symg/testdata/cjson/cJSON.c
new file mode 100644
index 00000000..fe5782af
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/cjson/cJSON.c
@@ -0,0 +1,9 @@
+#include "cJSON.h"
+
+CJSON_PUBLIC(char *)
+cJSON_Print(const cJSON *item) {}
+CJSON_PUBLIC(cJSON *)
+cJSON_ParseWithLength(const char *value, size_t buffer_length) {}
+/* Delete a cJSON entity and all subentities. */
+CJSON_PUBLIC(void)
+cJSON_Delete(cJSON *item) {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cjson/darwin/libcjson.a b/_xtool/llcppsymg/internal/symg/testdata/cjson/darwin/libcjson.a
new file mode 100644
index 00000000..b7f54d2a
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/cjson/darwin/libcjson.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cjson/linux/libcjson.a b/_xtool/llcppsymg/internal/symg/testdata/cjson/linux/libcjson.a
new file mode 100644
index 00000000..d0f6bc57
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/cjson/linux/libcjson.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cpp/cpp.cpp b/_xtool/llcppsymg/internal/symg/testdata/cpp/cpp.cpp
new file mode 100644
index 00000000..b3be4285
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/cpp/cpp.cpp
@@ -0,0 +1,10 @@
+#include "cpp.h"
+
+Foo::Foo(const char *filename) {}
+Foo::Foo(const char *buffer, long buffer_size) {}
+Foo::Foo::~Foo() {}
+int Foo::ParseBar() const {}
+const char *Foo::Get(const char *section, const char *name,
+                     const char *default_value) const {}
+
+const char *Foo::MakeBar(const char *section, const char *name) {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cpp/cpp.h b/_xtool/llcppsymg/internal/symg/testdata/cpp/cpp.h
index 60c14084..ffd5b02c 100644
--- a/_xtool/llcppsymg/internal/symg/testdata/cpp/cpp.h
+++ b/_xtool/llcppsymg/internal/symg/testdata/cpp/cpp.h
@@ -11,11 +11,9 @@ class Foo
     int ParseBar() const;
     // not in llcppg.cfg/symMap,generate automatically
     const char *Get(const char *section, const char *name,
-                            const char *default_value) const;
+                    const char *default_value) const;
+
 private:
     // not in output symbol table
     static const char *MakeBar(const char *section, const char *name);
 };
-
-// method out of class decl
-bool Foo::HasBar();
\ No newline at end of file
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cpp/darwin/libcpp.a b/_xtool/llcppsymg/internal/symg/testdata/cpp/darwin/libcpp.a
new file mode 100644
index 00000000..520fd186
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/cpp/darwin/libcpp.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cpp/expect.json b/_xtool/llcppsymg/internal/symg/testdata/cpp/expect.json
index a75bd83b..20b2648c 100644
--- a/_xtool/llcppsymg/internal/symg/testdata/cpp/expect.json
+++ b/_xtool/llcppsymg/internal/symg/testdata/cpp/expect.json
@@ -1,9 +1,4 @@
 [
-  {
-    "mangle": "_ZN3Foo6HasBarEv",
-    "c++": "Foo::HasBar()",
-    "go": "(*Foo).HasBar"
-  },
   {
     "mangle": "_ZN3FooC1EPKc",
     "c++": "Foo::Foo(const char *)",
diff --git a/_xtool/llcppsymg/internal/symg/testdata/cpp/linux/libcpp.a b/_xtool/llcppsymg/internal/symg/testdata/cpp/linux/libcpp.a
new file mode 100644
index 00000000..7d99c726
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/cpp/linux/libcpp.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/gpgerror/darwin/libgpgerror.a b/_xtool/llcppsymg/internal/symg/testdata/gpgerror/darwin/libgpgerror.a
new file mode 100644
index 00000000..9864b04f
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/gpgerror/darwin/libgpgerror.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/gpgerror/gpgerror.c b/_xtool/llcppsymg/internal/symg/testdata/gpgerror/gpgerror.c
new file mode 100644
index 00000000..d8e69127
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/gpgerror/gpgerror.c
@@ -0,0 +1,5 @@
+#include "gpgrt.h"
+
+const char *gpg_strerror(gpg_error_t err) {}
+int gpg_strerror_r(gpg_error_t err, char *buf, size_t buflen) {}
+const char *gpg_strsource(gpg_error_t err) {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/gpgerror/linux/libgpgerror.a b/_xtool/llcppsymg/internal/symg/testdata/gpgerror/linux/libgpgerror.a
new file mode 100644
index 00000000..c4fb8566
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/gpgerror/linux/libgpgerror.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/include/darwin/libinclude.a b/_xtool/llcppsymg/internal/symg/testdata/include/darwin/libinclude.a
new file mode 100644
index 00000000..6d3ab114
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/include/darwin/libinclude.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/include/linux/libinclude.a b/_xtool/llcppsymg/internal/symg/testdata/include/linux/libinclude.a
new file mode 100644
index 00000000..1b7ff300
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/include/linux/libinclude.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/include/temp.c b/_xtool/llcppsymg/internal/symg/testdata/include/temp.c
new file mode 100644
index 00000000..64f58c50
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/include/temp.c
@@ -0,0 +1,7 @@
+#include "temp.h"
+
+void Foo() {}
+void Foo_Conf() {}
+void Foo_Bar() {}
+static void Foo_Bar_Private() {}
+private void Foo_Bar_Private2() {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/inireader/INIReader.cpp b/_xtool/llcppsymg/internal/symg/testdata/inireader/INIReader.cpp
new file mode 100644
index 00000000..8a55efe2
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/inireader/INIReader.cpp
@@ -0,0 +1,10 @@
+#include "INIReader.h"
+
+__attribute__((visibility("default"))) INIReader::INIReader(const char *filename) {}
+INI_API INIReader::INIReader(const char *buffer, long buffer_size) {}
+INIReader::~INIReader() {}
+INI_API int INIReader::ParseError() const {}
+INI_API const char *INIReader::Get(const char *section, const char *name,
+                                   const char *default_value) const {}
+
+const char *INIReader::MakeKey(const char *section, const char *name) {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/inireader/darwin/libinireader.a b/_xtool/llcppsymg/internal/symg/testdata/inireader/darwin/libinireader.a
new file mode 100644
index 00000000..5e4e1de7
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/inireader/darwin/libinireader.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/inireader/linux/libinireader.a b/_xtool/llcppsymg/internal/symg/testdata/inireader/linux/libinireader.a
new file mode 100644
index 00000000..30cd6119
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/inireader/linux/libinireader.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/isl/darwin/libisl.a b/_xtool/llcppsymg/internal/symg/testdata/isl/darwin/libisl.a
new file mode 100644
index 00000000..0ad42ac9
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/isl/darwin/libisl.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/isl/isl.c b/_xtool/llcppsymg/internal/symg/testdata/isl/isl.c
new file mode 100644
index 00000000..31da05ca
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/isl/isl.c
@@ -0,0 +1,3 @@
+#include "isl/polynomial.h"
+
+isl_ctx *isl_pw_qpolynomial_get_ctx(__isl_keep isl_pw_qpolynomial *pwqp) {}
diff --git a/_xtool/llcppsymg/internal/symg/testdata/isl/linux/libisl.a b/_xtool/llcppsymg/internal/symg/testdata/isl/linux/libisl.a
new file mode 100644
index 00000000..796f00ae
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/isl/linux/libisl.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/lua/darwin/liblua.a b/_xtool/llcppsymg/internal/symg/testdata/lua/darwin/liblua.a
new file mode 100644
index 00000000..2bd4350b
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/lua/darwin/liblua.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/lua/expect.json b/_xtool/llcppsymg/internal/symg/testdata/lua/expect.json
index de180c0e..444f84f0 100644
--- a/_xtool/llcppsymg/internal/symg/testdata/lua/expect.json
+++ b/_xtool/llcppsymg/internal/symg/testdata/lua/expect.json
@@ -1,4 +1,9 @@
 [
+  {
+    "mangle": "lua_closeslot",
+    "c++": "lua_closeslot(lua_State *, int)",
+    "go": "(*State).Closeslot"
+  },
   {
     "mangle": "lua_concat",
     "c++": "lua_concat(lua_State *, int)",
@@ -9,14 +14,29 @@
     "c++": "lua_error(lua_State *)",
     "go": "(*State).Error"
   },
+  {
+    "mangle": "lua_len",
+    "c++": "lua_len(lua_State *, int)",
+    "go": "(*State).Len"
+  },
   {
     "mangle": "lua_next",
     "c++": "lua_next(lua_State *, int)",
     "go": "(*State).Next"
   },
+  {
+    "mangle": "lua_setallocf",
+    "c++": "lua_setallocf(lua_State *, lua_Alloc, void *)",
+    "go": "(*State).Setallocf"
+  },
   {
     "mangle": "lua_stringtonumber",
     "c++": "lua_stringtonumber(lua_State *, const char *)",
     "go": "(*State).Stringtonumber"
+  },
+  {
+    "mangle": "lua_toclose",
+    "c++": "lua_toclose(lua_State *, int)",
+    "go": "(*State).Toclose"
   }
 ]
\ No newline at end of file
diff --git a/_xtool/llcppsymg/internal/symg/testdata/lua/linux/liblua.a b/_xtool/llcppsymg/internal/symg/testdata/lua/linux/liblua.a
new file mode 100644
index 00000000..a189005e
Binary files /dev/null and b/_xtool/llcppsymg/internal/symg/testdata/lua/linux/liblua.a differ
diff --git a/_xtool/llcppsymg/internal/symg/testdata/lua/lua.c b/_xtool/llcppsymg/internal/symg/testdata/lua/lua.c
new file mode 100644
index 00000000..e9231c10
--- /dev/null
+++ b/_xtool/llcppsymg/internal/symg/testdata/lua/lua.c
@@ -0,0 +1,10 @@
+#include "lua.h"
+
+int(lua_error)(lua_State *L) {}
+void(lua_concat)(lua_State *L, int n) {}
+int(lua_next)(lua_State *L, int idx) {}
+void(lua_len)(lua_State *L, int idx) {}
+long unsigned int(lua_stringtonumber)(lua_State *L, const char *s) {}
+void(lua_setallocf)(lua_State *L, lua_Alloc f, void *ud) {}
+void(lua_toclose)(lua_State *L, int idx) {}
+void(lua_closeslot)(lua_State *L, int idx) {}