From 478791a2d80708004a313f1130c9145b3ab77510 Mon Sep 17 00:00:00 2001
From: Oleg Shparber <oleg@zealdocs.org>
Date: Sun, 7 Jan 2018 17:10:44 +0200
Subject: [PATCH] cmake: Require Qt version >= 5.5.1

---
 CMakeLists.txt         | 2 ++
 src/app/CMakeLists.txt | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e4348f6..2672bbf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,5 +15,7 @@ string(TIMESTAMP PROJECT_COPYRIGHT "© 2015-%Y Oleg Shparber" UTC)
 set(PROJECT_DESCRIPTION "A simple documentation browser.")
 set(PROJECT_URL "https://zealdocs.org")
 
+set(QT_MINIMUM_VERSION 5.5.1)
+
 add_subdirectory(assets)
 add_subdirectory(src)
diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index 4e076d2..cd04a08 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -19,6 +19,10 @@ add_executable(App WIN32
 target_link_libraries(App Core Util)
 
 find_package(Qt5 COMPONENTS Widgets REQUIRED)
+if (Qt5Widgets_VERSION VERSION_LESS QT_MINIMUM_VERSION)
+    message(FATAL_ERROR "Qt version >= ${QT_MINIMUM_VERSION} is required.")
+endif()
+
 target_link_libraries(App Qt5::Widgets)
 
 set_target_properties(App PROPERTIES