diff --git a/cl/_testlibc/sqlite/out.ll b/cl/_testlibc/sqlite/out.ll
index 339ca048..bdf9be1a 100644
--- a/cl/_testlibc/sqlite/out.ll
+++ b/cl/_testlibc/sqlite/out.ll
@@ -13,7 +13,7 @@ _llgo_0:
   br i1 %1, label %_llgo_1, label %_llgo_2
 
 _llgo_1:                                          ; preds = %_llgo_0
-  %2 = call ptr @sqlite3_errstr()
+  %2 = call ptr @sqlite3_errstr(i32 %0)
   %3 = call i32 (ptr, ...) @printf(ptr @0, i32 %0, ptr %2)
   call void @exit(i32 1)
   br label %_llgo_2
@@ -45,11 +45,11 @@ _llgo_0:
   %3 = extractvalue { ptr, i32 } %2, 0
   %4 = extractvalue { ptr, i32 } %2, 1
   call void @main.check(i32 %4)
-  %5 = call i32 @sqlite3_close()
+  %5 = call i32 @sqlite3_close(ptr %3)
   ret void
 }
 
-declare ptr @sqlite3_errstr()
+declare ptr @sqlite3_errstr(i32)
 
 declare i32 @printf(ptr, ...)
 
@@ -59,4 +59,4 @@ declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
 declare { ptr, i32 } @"github.com/goplus/llgo/x/sqlite.OpenV2"(ptr, i32, ptr)
 
-declare i32 @sqlite3_close()
+declare i32 @sqlite3_close(ptr)
diff --git a/cl/_testpy/callpy/in.go b/cl/_testpy/callpy/in.go
index 12424d62..21ec21ab 100644
--- a/cl/_testpy/callpy/in.go
+++ b/cl/_testpy/callpy/in.go
@@ -4,12 +4,9 @@ import (
 	"github.com/goplus/llgo/c"
 	"github.com/goplus/llgo/py"
 	"github.com/goplus/llgo/py/math"
-	"github.com/goplus/llgo/py/os"
 )
 
 func main() {
 	x := math.Sqrt(py.Float(2))
-	wd := os.Getcwd()
 	c.Printf(c.Str("sqrt(2) = %f\n"), x.Float64())
-	c.Printf(c.Str("cwd = %s\n"), wd.CStr())
 }
diff --git a/cl/_testpy/callpy/out.ll b/cl/_testpy/callpy/out.ll
index c982584d..c5c1d258 100644
--- a/cl/_testpy/callpy/out.ll
+++ b/cl/_testpy/callpy/out.ll
@@ -5,13 +5,9 @@ source_filename = "main"
 @__llgo_argc = global ptr null
 @__llgo_argv = global ptr null
 @__llgo_py.math.sqrt = linkonce global ptr null
-@__llgo_py.os.getcwd = linkonce global ptr null
 @0 = private unnamed_addr constant [14 x i8] c"sqrt(2) = %f\0A\00", align 1
-@1 = private unnamed_addr constant [10 x i8] c"cwd = %s\0A\00", align 1
 @__llgo_py.math = external global ptr
-@2 = private unnamed_addr constant [5 x i8] c"sqrt\00", align 1
-@__llgo_py.os = external global ptr
-@3 = private unnamed_addr constant [7 x i8] c"getcwd\00", align 1
+@1 = private unnamed_addr constant [5 x i8] c"sqrt\00", align 1
 
 define void @main.init() {
 _llgo_0:
@@ -21,11 +17,8 @@ _llgo_0:
 _llgo_1:                                          ; preds = %_llgo_0
   store i1 true, ptr @"main.init$guard", align 1
   call void @"github.com/goplus/llgo/py/math.init"()
-  call void @"github.com/goplus/llgo/py/os.init"()
   %1 = load ptr, ptr @__llgo_py.math, align 8
-  call void (ptr, ...) @llgoLoadPyModSyms(ptr %1, ptr @2, ptr @__llgo_py.math.sqrt, ptr null)
-  %2 = load ptr, ptr @__llgo_py.os, align 8
-  call void (ptr, ...) @llgoLoadPyModSyms(ptr %2, ptr @3, ptr @__llgo_py.os.getcwd, ptr null)
+  call void (ptr, ...) @llgoLoadPyModSyms(ptr %1, ptr @1, ptr @__llgo_py.math.sqrt, ptr null)
   br label %_llgo_2
 
 _llgo_2:                                          ; preds = %_llgo_1, %_llgo_0
@@ -42,33 +35,23 @@ _llgo_0:
   %2 = call ptr @PyFloat_FromDouble(double 2.000000e+00)
   %3 = load ptr, ptr @__llgo_py.math.sqrt, align 8
   %4 = call ptr @PyObject_CallOneArg(ptr %3, ptr %2)
-  %5 = load ptr, ptr @__llgo_py.os.getcwd, align 8
-  %6 = call ptr @PyObject_CallNoArgs(ptr %5)
-  %7 = call double @PyFloat_AsDouble()
-  %8 = call i32 (ptr, ...) @printf(ptr @0, double %7)
-  %9 = call ptr @PyBytes_AsString()
-  %10 = call i32 (ptr, ...) @printf(ptr @1, ptr %9)
+  %5 = call double @PyFloat_AsDouble(ptr %4)
+  %6 = call i32 (ptr, ...) @printf(ptr @0, double %5)
   ret void
 }
 
 declare void @"github.com/goplus/llgo/py/math.init"()
 
-declare void @"github.com/goplus/llgo/py/os.init"()
-
 declare void @"github.com/goplus/llgo/internal/runtime.init"()
 
 declare ptr @PyFloat_FromDouble(double)
 
 declare ptr @PyObject_CallOneArg(ptr, ptr)
 
-declare ptr @PyObject_CallNoArgs(ptr)
-
-declare double @PyFloat_AsDouble()
+declare double @PyFloat_AsDouble(ptr)
 
 declare i32 @printf(ptr, ...)
 
-declare ptr @PyBytes_AsString()
-
 declare void @llgoLoadPyModSyms(ptr, ...)
 
 declare void @Py_Initialize()
diff --git a/ssa/type_cvt.go b/ssa/type_cvt.go
index 8346577e..e8bd1c3d 100644
--- a/ssa/type_cvt.go
+++ b/ssa/type_cvt.go
@@ -57,8 +57,11 @@ func (p Program) Type(typ types.Type, bg Background) Type {
 
 // FuncDecl converts a Go/C function declaration into raw type.
 func (p Program) FuncDecl(sig *types.Signature, bg Background) Type {
+	recv := sig.Recv()
 	if bg == InGo {
-		sig = p.gocvt.cvtFunc(sig, sig.Recv())
+		sig = p.gocvt.cvtFunc(sig, recv)
+	} else if recv != nil { // even in C, we need to add ctx for method
+		sig = FuncAddCtx(recv, sig)
 	}
 	return &aType{p.toLLVMFunc(sig), rawType{sig}, vkFuncDecl}
 }