From e3dc9cb68330e8b7066ba307883248f5c53bdada Mon Sep 17 00:00:00 2001
From: Dongxu Li <dongxuli2011@gmail.com>
Date: Thu, 3 Aug 2017 01:03:38 -0400
Subject: [PATCH] extern C

---
 app/QCPDialog.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/QCPDialog.h b/app/QCPDialog.h
index 84dd59d..13a3fb0 100644
--- a/app/QCPDialog.h
+++ b/app/QCPDialog.h
@@ -1,8 +1,11 @@
 #ifndef QCPDIALOG_H
 #define QCPDIALOG_H
 
-#include <QAbstractPrintDialog>
+extern "C" {
 #include <CPDFrontend.h>
+}
+
+#include <QAbstractPrintDialog>
 
 class QPrinter;
 class QGridLayout;