From c9d7b391908194ce8848c37944bb7f0f77ff4a46 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20K=C3=B6fferlein?= <matthias@koefferlein.de>
Date: Sat, 8 Sep 2018 23:11:16 +0200
Subject: [PATCH] Fixed a general linker problem with release builds on MSVC

---
 src/klayout.pri | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/klayout.pri b/src/klayout.pri
index 02781de7b..5a146a8cb 100644
--- a/src/klayout.pri
+++ b/src/klayout.pri
@@ -95,6 +95,9 @@ msvc {
       /wd4251 \                   # Disable "DLL interface required"
       /source-charset:utf-8 \     # Use UTF-8 for source files
 
+  QMAKE_LFLAGS += \
+      /OPT:NOREF \                # preserves functions we want to keep for implementing the "force link" mechanism
+
   QMAKE_CXXFLAGS_WARN_ON += \
 
 } else {