Compiler Warning (level 1) C4441
Collapse the table of content
Expand the table of content
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here. ArchiveDisclaimer

Compiler Warning (level 1) C4441

Error Message

calling convention of 'cc1' ignored; 'cc2' used instead

Member functions in managed user-defined types and global function generics must use the __clrcall calling convention. The compiler used __clrcall.


The following sample generates C4441.

// C4441.cpp
// compile with: /clr /W1 /c
generic <class ItemType>
void __cdecl Test(ItemType item) {}   // C4441
// try the following line instead
// void Test(ItemType item) {}

ref struct MyStruct {
   void __cdecl Test(){}   // C4441
   void Test2(){}   // OK
© 2016 Microsoft