From: Eden Li <eden.li@gmail.com>
Date: Mon, 30 Nov 2009 02:14:39 +0000 (-0800)
Subject: cgo: use C type void for opaque types if dwarf.Common().Type returns nothing
X-Git-Tag: weekly.2009-12-07~117
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=354b100567e9e75488b13f5a6555bd95f299cd3b;p=gostls13.git

cgo: use C type void for opaque types if dwarf.Common().Type returns nothing

Ideally, the C name would come from the typedef or pointer that
references the Size<0 type, but we can't easily generate this without
performing a look-ahead to see if any referencing type will become opaque.

Fixes #334.
Fixes #281.

R=rsc
https://golang.org/cl/161056
---

diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go
index d2a7eeaddb..7d377db54c 100644
--- a/src/cmd/cgo/gcc.go
+++ b/src/cmd/cgo/gcc.go
@@ -320,6 +320,9 @@ func (c *typeConv) Type(dtype dwarf.Type) *Type {
 		// Unsized types are [0]byte
 		t.Size = 0;
 		t.Go = c.Opaque(0);
+		if t.C == "" {
+			t.C = "void"
+		}
 		return t;
 	}