diff --git a/cl/_testrt/alloca/in.go b/cl/_testrt/alloca/in.go
index 5550ac64..95a3dcf1 100644
--- a/cl/_testrt/alloca/in.go
+++ b/cl/_testrt/alloca/in.go
@@ -1,14 +1,12 @@
 package main
 
 import (
-	"unsafe"
-
 	"github.com/goplus/llgo/internal/runtime/c"
 )
 
 func main() {
 	s := c.Str("Hi\n")
 	s2 := c.Alloca(4)
-	c.Memcpy(s2, unsafe.Pointer(s), 4)
+	c.Memcpy(s2, c.Pointer(s), 4)
 	c.Printf(c.Str("%s"), s2)
 }
diff --git a/cl/_testrt/glbarray/in.go b/cl/_testrt/glbarray/in.go
new file mode 100644
index 00000000..aa43d00a
--- /dev/null
+++ b/cl/_testrt/glbarray/in.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"github.com/goplus/llgo/internal/abi"
+	"github.com/goplus/llgo/internal/runtime/c"
+)
+
+func Basic(kind abi.Kind) *abi.Type {
+	ret := basicTypes[kind]
+	c.Printf(c.Str("Basic: %p, %d, %d, %d, %d\n"),
+		ret, c.Int(ret.Hash), c.Int(ret.Kind_), c.Int(kind), c.Int(ret.Size_))
+	return ret
+}
+
+var (
+	basicTypes = [...]*abi.Type{
+		abi.String: basicType(abi.String),
+	}
+	sizeBasicTypes = [...]uintptr{
+		abi.String: 16,
+	}
+)
+
+func basicType(kind abi.Kind) *abi.Type {
+	ret := &abi.Type{
+		Size_: sizeBasicTypes[kind],
+		Hash:  uint32(kind),
+		Kind_: uint8(kind),
+	}
+	c.Printf(c.Str("basicType: %p, %d, %d, %d, %d\n"),
+		ret, c.Int(ret.Hash), c.Int(ret.Kind_), c.Int(kind), c.Int(ret.Size_))
+	return ret
+}
+
+func main() {
+	t := Basic(abi.String)
+	c.Printf(c.Str("Kind: %d, Size: %d\n"), int(t.Kind_), t.Size_)
+}
diff --git a/cl/_testrt/glbarray/out.ll b/cl/_testrt/glbarray/out.ll
new file mode 100644
index 00000000..1fdf67ea
--- /dev/null
+++ b/cl/_testrt/glbarray/out.ll
@@ -0,0 +1,93 @@
+; ModuleID = 'main'
+source_filename = "main"
+
+%"github.com/goplus/llgo/internal/abi.Type" = type { i64, i64, i32, i8, i8, i8, i8, ptr, ptr, i32, i32 }
+
+@main.basicTypes = global ptr null
+@"main.init$guard" = global ptr null
+@main.sizeBasicTypes = global ptr null
+@0 = private unnamed_addr constant [27 x i8] c"Basic: %p, %d, %d, %d, %d\0A\00", align 1
+@1 = private unnamed_addr constant [31 x i8] c"basicType: %p, %d, %d, %d, %d\0A\00", align 1
+@2 = private unnamed_addr constant [20 x i8] c"Kind: %d, Size: %d\0A\00", align 1
+
+define ptr @main.Basic(i64 %0) {
+_llgo_0:
+  %1 = getelementptr inbounds ptr, ptr @main.basicTypes, i64 %0
+  %2 = load ptr, ptr %1, align 8
+  %3 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %2, i32 0, i32 2
+  %4 = load i32, ptr %3, align 4
+  %5 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %2, i32 0, i32 6
+  %6 = load i8, ptr %5, align 1
+  %7 = sext i8 %6 to i32
+  %8 = trunc i64 %0 to i32
+  %9 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %2, i32 0, i32 0
+  %10 = load i64, ptr %9, align 4
+  %11 = trunc i64 %10 to i32
+  %12 = call i32 (ptr, ...) @printf(ptr @0, ptr %2, i32 %4, i32 %7, i32 %8, i32 %11)
+  ret ptr %2
+}
+
+define ptr @main.basicType(i64 %0) {
+_llgo_0:
+  %1 = call ptr @"github.com/goplus/llgo/internal/runtime.Alloc"(i64 16)
+  %2 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %1, i32 0, i32 0
+  %3 = getelementptr inbounds i64, ptr @main.sizeBasicTypes, i64 %0
+  %4 = load i64, ptr %3, align 4
+  %5 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %1, i32 0, i32 2
+  %6 = trunc i64 %0 to i32
+  %7 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %1, i32 0, i32 6
+  %8 = trunc i64 %0 to i8
+  store i64 %4, ptr %2, align 4
+  store i32 %6, ptr %5, align 4
+  store i8 %8, ptr %7, align 1
+  %9 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %1, i32 0, i32 2
+  %10 = load i32, ptr %9, align 4
+  %11 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %1, i32 0, i32 6
+  %12 = load i8, ptr %11, align 1
+  %13 = sext i8 %12 to i32
+  %14 = trunc i64 %0 to i32
+  %15 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %1, i32 0, i32 0
+  %16 = load i64, ptr %15, align 4
+  %17 = trunc i64 %16 to i32
+  %18 = call i32 (ptr, ...) @printf(ptr @1, ptr %1, i32 %10, i32 %13, i32 %14, i32 %17)
+  ret ptr %1
+}
+
+define void @main.init() {
+_llgo_0:
+  %0 = load i1, ptr @"main.init$guard", align 1
+  br i1 %0, label %_llgo_2, label %_llgo_1
+
+_llgo_1:                                          ; preds = %_llgo_0
+  store i1 true, ptr @"main.init$guard", align 1
+  call void @"github.com/goplus/llgo/internal/abi.init"()
+  store i64 16, ptr getelementptr inbounds (i64, ptr @main.sizeBasicTypes, i64 24), align 4
+  %1 = call ptr @main.basicType(i64 24)
+  store ptr %1, ptr getelementptr inbounds (ptr, ptr @main.basicTypes, i64 24), align 8
+  br label %_llgo_2
+
+_llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
+  ret void
+}
+
+define void @main() {
+_llgo_0:
+  call void @"github.com/goplus/llgo/internal/runtime.init"()
+  call void @main.init()
+  %0 = call ptr @main.Basic(i64 24)
+  %1 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %0, i32 0, i32 6
+  %2 = load i8, ptr %1, align 1
+  %3 = sext i8 %2 to i64
+  %4 = getelementptr inbounds %"github.com/goplus/llgo/internal/abi.Type", ptr %0, i32 0, i32 0
+  %5 = load i64, ptr %4, align 4
+  %6 = call i32 (ptr, ...) @printf(ptr @2, i64 %3, i64 %5)
+  ret void
+}
+
+declare i32 @printf(ptr, ...)
+
+declare ptr @"github.com/goplus/llgo/internal/runtime.Alloc"(i64)
+
+declare void @"github.com/goplus/llgo/internal/abi.init"()
+
+declare void @"github.com/goplus/llgo/internal/runtime.init"()
diff --git a/internal/build/build.go b/internal/build/build.go
index 0d92d55a..34a5947b 100644
--- a/internal/build/build.go
+++ b/internal/build/build.go
@@ -185,7 +185,7 @@ func linkMainPkg(pkg *packages.Package, runtimeFiles []string, conf *Config, mod
 	args[2] = "-Wno-override-module"
 	needRuntime := false
 	packages.Visit([]*packages.Package{pkg}, nil, func(p *packages.Package) {
-		if p.ExportFile != "" { // skip packages that only contain declarations
+		if p.ExportFile != "" && !isRuntimePkg(p.PkgPath) { // skip packages that only contain declarations
 			args = append(args, p.ExportFile+".ll")
 			if !needRuntime {
 				needRuntime = isNeedRuntime(p)
@@ -206,7 +206,9 @@ func linkMainPkg(pkg *packages.Package, runtimeFiles []string, conf *Config, mod
 	}()
 
 	// TODO(xsw): show work
-	// fmt.Fprintln(os.Stderr, "clang", args)
+	if verbose {
+		fmt.Fprintln(os.Stderr, "clang", args)
+	}
 	err := clang.New("").Exec(args...)
 	check(err)
 
@@ -328,17 +330,24 @@ func allLinkFiles(rt []*packages.Package) (outFiles []string) {
 	outFiles = make([]string, 0, len(rt))
 	root := rootLLGo(rt[0])
 	packages.Visit(rt, nil, func(p *packages.Package) {
-		if hasLinkFile(p) {
-			outFile := filepath.Join(root+p.PkgPath[len(llgoModPath):], "llgo_autogen.ll")
+		pkgPath := p.PkgPath
+		if isRuntimePkg(pkgPath) {
+			outFile := filepath.Join(root+pkgPath[len(llgoModPath):], "llgo_autogen.ll")
 			outFiles = append(outFiles, outFile)
 		}
 	})
 	return
 }
 
-func hasLinkFile(pkg *packages.Package) bool {
-	if isPkgInLLGo(pkg.PkgPath) {
-		return cl.PkgKindOf(pkg.Types) != cl.PkgDeclOnly
+const (
+	pkgAbi     = llgoModPath + "/internal/abi"
+	pkgRuntime = llgoModPath + "/internal/runtime"
+)
+
+func isRuntimePkg(pkgPath string) bool {
+	switch pkgPath {
+	case pkgRuntime, pkgAbi:
+		return true
 	}
 	return false
 }
@@ -352,6 +361,7 @@ const (
 	llgoModPath = "github.com/goplus/llgo"
 )
 
+/*
 func isPkgInLLGo(pkgPath string) bool {
 	return isPkgInMod(pkgPath, llgoModPath)
 }
@@ -363,6 +373,7 @@ func isPkgInMod(pkgPath, modPath string) bool {
 	}
 	return false
 }
+*/
 
 func check(err error) {
 	if err != nil {