1 files changed, 15 insertions, 0 deletions
diff --git a/src/runtime/cgo/iscgo.c b/src/runtime/cgo/iscgo.c
new file mode 100644
index 000000000..0907a1958
--- /dev/null
+++ b/src/runtime/cgo/iscgo.c
@@ -0,0 +1,15 @@
+// Copyright 2010 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The runtime package contains an uninitialized definition
+// for runtime·iscgo.  Override it to tell the runtime we're here.
+// There are various function pointers that should be set too,
+// but those depend on dynamic linker magic to get initialized
+// correctly, and sometimes they break.  This variable is a
+// backup: it depends only on old C style static linking rules.
+
+#include "../runtime.h"
+
+bool runtime·iscgo = 1;
+uint32 runtime·needextram = 1;  // create an extra M on first cgo call