source: upstream commit
https://github.com/haiwen/seafile-client/commit/552fb023163db9554eeaa5063bc38a86b01e4e22

From 552fb023163db9554eeaa5063bc38a86b01e4e22 Mon Sep 17 00:00:00 2001
From: sun20121818 <1184550842@qq.com>
Date: Wed, 3 Jun 2020 11:40:56 +0800
Subject: [PATCH] support choose qtwebkit or qtwebengine (#1300)

---
 CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4a3e5709..a7735112 100644
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -43,6 +43,8 @@ OPTION(BUILD_SHIBBOLETH_SUPPORT "Build Shibboleth support" OFF)
 
 option(BUILD_ENABLE_WARNINGS "Enable compiler warnings." ON)
 
+option(USE_QT_WEBKIT "Build use QT webkit" OFF)
+
 option(BUILD_SPARKLE_SUPPORT "Build Sparkle support" OFF)
 IF (BUILD_SPARKLE_SUPPORT)
     ADD_DEFINITIONS(-DHAVE_SPARKLE_SUPPORT)
@@ -164,7 +166,7 @@ EXECUTE_PROCESS(COMMAND
     OUTPUT_VARIABLE DETECTED_QT_VERSION
     OUTPUT_STRIP_TRAILING_WHITESPACE)
 MESSAGE("qt5 version: ${DETECTED_QT_VERSION}")
-IF(WIN32 OR DETECTED_QT_VERSION VERSION_LESS 5.6.0)
+IF(USE_QT_WEBKIT)
     ADD_DEFINITIONS(-DSEAFILE_USE_WEBKIT)
     SET(WEBKIT_NAME "WebKit")
     SET(WEBKIT_WIDGETS_NAME "WebKitWidgets")
-- 
2.27.0