Submitted upstream: https://github.com/AntiMicro/antimicro/pull/207

From e5d2c880ac336bc9ff558c43fe5ed7d47df28bbe Mon Sep 17 00:00:00 2001
From: Raphael Kubo da Costa <rakuco@FreeBSD.org>
Date: Mon, 29 Jan 2018 12:19:55 +0100
Subject: [PATCH] cmake: Stop calling QT5_WRAP_CPP().

The USE_QT5 code path already unconditionally sets CMAKE_AUTOMOC to on.

Calling QT5_WRAP_CPP() used to be just redundant, as antimicro_HEADERS_MOC
was never actually added as a source dependency of the antiword target. In
other words, CMake's own automoc infrastructure was actually being used and
the moc invocations from QT5_WRAP_CPP() were not being made at all.

Starting with Qt 5.9.4, calling QT5_WRAP_CPP() disables the AUTOMOC property
on the macro's input files, which means neither CMake's automoc
infrastructure not QT5_WRAP_CPP()'s code were being used and we ended up
with several 'undefined reference to vtable' errors when linking.
--- CMakeLists.txt.orig	2016-11-06 01:23:03 UTC
+++ CMakeLists.txt
@@ -499,7 +499,6 @@ if (UNIX)
         find_package(Qt5Network REQUIRED)
         find_package(Qt5LinguistTools REQUIRED)
 
-        QT5_WRAP_CPP(antimicro_HEADERS_MOC ${antimicro_HEADERS})
         QT5_WRAP_UI(antimicro_FORMS_HEADERS ${antimicro_FORMS})
         QT5_ADD_RESOURCES(antimicro_RESOURCES_RCC ${antimicro_RESOURCES})
         add_subdirectory("share/antimicro/translations")
@@ -550,7 +549,6 @@ elseif(WIN32)
     find_package(Qt5Network REQUIRED)
     find_package(Qt5LinguistTools REQUIRED)
 
-    QT5_WRAP_CPP(antimicro_HEADERS_MOC ${antimicro_HEADERS})
     QT5_WRAP_UI(antimicro_FORMS_HEADERS ${antimicro_FORMS})
     QT5_ADD_RESOURCES(antimicro_RESOURCES_RCC ${antimicro_RESOURCES})
     add_subdirectory("share/antimicro/translations")