diff --git a/internal/runtime/bdwgc/bdwgc.go b/internal/runtime/bdwgc/bdwgc.go
new file mode 100644
index 00000000..f15c1bad
--- /dev/null
+++ b/internal/runtime/bdwgc/bdwgc.go
@@ -0,0 +1,74 @@
+package bdwgc
+
+import "C"
+import (
+	_ "unsafe"
+
+	"github.com/goplus/llgo/c"
+)
+
+const (
+	LLGoPackage = "link: $LLGO_LIB_BDWGC; $(pkg-config --libs bdw-gc); -lgc"
+)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Init C.GC_init
+func Init()
+
+//go:linkname Malloc C.GC_malloc
+func Malloc(size uintptr) c.Pointer
+
+//go:linkname Realloc C.GC_realloc
+func Realloc(ptr c.Pointer, size uintptr) c.Pointer
+
+//go:linkname Free C.GC_free
+func Free(ptr c.Pointer)
+
+// -----------------------------------------------------------------------------
+
+//go:linkname RegisterFinalizer C.GC_register_finalizer
+func RegisterFinalizer(obj c.Pointer, fn func(c.Pointer, c.Pointer), cd c.Pointer, old_fn *func(c.Pointer, c.Pointer), old_cd *c.Pointer) int
+
+//go:linkname RegisterFinalizerNoOrder C.GC_register_finalizer_no_order
+func RegisterFinalizerNoOrder(obj c.Pointer, fn func(c.Pointer, c.Pointer), cd c.Pointer, old_fn *func(c.Pointer, c.Pointer), old_cd *c.Pointer) int
+
+//go:linkname RegisterFinalizerIgnoreSelf C.GC_register_finalizer_ignore_self
+func RegisterFinalizerIgnoreSelf(obj c.Pointer, fn func(c.Pointer, c.Pointer), cd c.Pointer, old_fn *func(c.Pointer, c.Pointer), old_cd *c.Pointer) int
+
+//go:linkname RegisterFinalizerUnreachable C.GC_register_finalizer_unreachable
+func RegisterFinalizerUnreachable(obj c.Pointer, fn func(c.Pointer, c.Pointer), cd c.Pointer, old_fn *func(c.Pointer, c.Pointer), old_cd *c.Pointer) int
+
+// -----------------------------------------------------------------------------
+
+//go:linkname Enable C.GC_enable
+func Enable()
+
+//go:linkname Disable C.GC_disable
+func Disable()
+
+//go:linkname IsDisabled C.GC_is_disabled
+func IsDisabled() int
+
+//go:linkname Gcollect C.GC_gcollect
+func Gcollect()
+
+//go:linkname GetMemoryUse C.GC_get_memory_use
+func GetMemoryUse() uintptr
+
+// -----------------------------------------------------------------------------
+
+//go:linkname EnableIncremental C.GC_enable_incremental
+func EnableIncremental()
+
+//go:linkname IsIncrementalMode C.GC_is_incremental_mode
+func IsIncrementalMode() int
+
+//go:linkname IncrementalProtectionNeeds C.GC_incremental_protection_needs
+func IncrementalProtectionNeeds() int
+
+//go:linkname StartIncrementalCollection C.GC_start_incremental_collection
+func StartIncrementalCollection()
+
+//go:linkname CollectALittle C.GC_collect_a_little
+func CollectALittle()
diff --git a/internal/runtime/bdwgc/llgo_autogen.lla b/internal/runtime/bdwgc/llgo_autogen.lla
new file mode 100644
index 00000000..5e1a1ad7
Binary files /dev/null and b/internal/runtime/bdwgc/llgo_autogen.lla differ
diff --git a/internal/runtime/z_c.go b/internal/runtime/z_c.go
index c2767b6c..29eb16ff 100644
--- a/internal/runtime/z_c.go
+++ b/internal/runtime/z_c.go
@@ -20,17 +20,18 @@ import (
 	"unsafe"
 
 	"github.com/goplus/llgo/internal/abi"
+	"github.com/goplus/llgo/internal/runtime/bdwgc"
 	"github.com/goplus/llgo/internal/runtime/c"
 )
 
 // AllocU allocates uninitialized memory.
 func AllocU(size uintptr) unsafe.Pointer {
-	return c.Malloc(size)
+	return bdwgc.Malloc(size)
 }
 
 // AllocZ allocates zero-initialized memory.
 func AllocZ(size uintptr) unsafe.Pointer {
-	ret := c.Malloc(size)
+	ret := bdwgc.Malloc(size)
 	return c.Memset(ret, 0, size)
 }