From e7c72b072bd42904736f1e5a6d3f5dec64d45b68 Mon Sep 17 00:00:00 2001
From: David Nadlinger <code@klickverbot.at>
Date: Thu, 27 Sep 2012 23:53:04 +0200
Subject: [PATCH] Default to C-style variadics for all calling conventions.

Fixes DMD testcase 'callingconv'.
---
 gen/functions.cpp | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/gen/functions.cpp b/gen/functions.cpp
index 438a167d..8b5754ce 100644
--- a/gen/functions.cpp
+++ b/gen/functions.cpp
@@ -116,14 +116,11 @@ llvm::FunctionType* DtoFunctionType(Type* type, Type* thistype, Type* nesttype,
                 lidx++;
             }
         }
-        else if (f->linkage == LINKc)
-        {
-            fty.c_vararg = true;
-        }
         else
         {
-            type->error(0, "invalid linkage for variadic function");
-            fatal();
+            // Default to C-style varargs for non-extern(D) variadic functions.
+            // This seems to be what DMD does.
+            fty.c_vararg = true;
         }
     }