Make Qt components not required for flexibility between Qt6 and Qt5

paceholder · paceholder · commit d301d9c85e41 · 2022-02-12T21:14:30.000+01:00
diff --git a/.appveyor.yml b/.appveyor.yml
@@ -10,7 +10,7 @@ environment:
     - GENERATOR : "Visual Studio 15 2017"
       ARCHITECTURE : ""
       APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      QTDIR: C:\Qt\5.13.2\msvc2017
+      QTDIR: C:\Qt\5.15.2\msvc2017
       PLATFORM: Win32
     - GENERATOR : "MinGW Makefiles"
       ARCHITECTURE : ""
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -38,7 +38,7 @@ add_subdirectory(external)
 
 # Find the QtWidgets library
 find_package(Qt6
-  REQUIRED COMPONENTS
+  COMPONENTS
    Core
    Widgets
    Gui
@@ -47,14 +47,18 @@ find_package(Qt6
 
 if (NOT Qt6_FOUND)
   find_package(Qt5 5.15
-    REQUIRED COMPONENTS
+    COMPONENTS
      Core
      Widgets
      Gui
      OpenGL
   )
 endif()
 
+if (NOT (Qt6_FOUND OR Qt5_FOUND))
+  message(FATAL_ERRROR "Qt libraries were not found.")
+endif()
+
 
 qt_add_resources(RESOURCES ./resources/resources.qrc)
 
