1 // RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-pc-win32 2 foo(int a,...)3 void __attribute__((sysv_abi)) foo(int a, ...) { 4 __builtin_va_list ap; 5 __builtin_va_start(ap, a); // expected-error {{'va_start' used in System V ABI function}} 6 } 7