From d91dd0cff1641d7c50f7cde13f7528130e60ab66 Mon Sep 17 00:00:00 2001
From: dlyr <github@dlyr.fr>
Date: Sat, 16 Jul 2022 08:28:14 +0200
Subject: [PATCH] use qt-version

---
 Config.cmake.in           |  2 ++
 cmake/findQtPackage.cmake | 26 ++++++++++++++++++++++----
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/Config.cmake.in b/Config.cmake.in
index 2466e42..184c994 100644
--- a/Config.cmake.in
+++ b/Config.cmake.in
@@ -14,7 +14,9 @@ if(NOT TARGET @PROJECT_NAME@)
             set(MY_OPTIONS_COMPONENTS "")
         endif()
 
+        if(NOT QT_DEFAULT_MAJOR_VERSION OR QT_DEFAULT_MAJOR_VERSION STREQUAL "6")
         find_package(Qt6 COMPONENTS ${MY_OPTIONS_COMPONENTS} QUIET)
+        endif()
         if(NOT Qt6_FOUND)
             if(${MY_OPTIONS_REQUIRED})
                 find_package(Qt5 5.15 COMPONENTS ${MY_OPTIONS_COMPONENTS} REQUIRED)
diff --git a/cmake/findQtPackage.cmake b/cmake/findQtPackage.cmake
index 8337507..17101cd 100644
--- a/cmake/findQtPackage.cmake
+++ b/cmake/findQtPackage.cmake
@@ -1,3 +1,14 @@
+cmake_minimum_required(VERSION 3.16)
+
+# Find Qt5 or Qt6 packages Parameters: COMPONENTS <component_list>: optional
+# parameter listing the Qt packages (e.g. Core, Widgets REQUIRED: optional
+# parameter propagated to find_package
+#
+# Usage: find_qt_package(COMPONENTS Core Widgets OpenGL Xml REQUIRED) which is
+# equivalent to: find_package(Qt6 COMPONENTS Core Widgets OpenGL Xml REQUIRED)
+# if Qt6 is available, or: find_package(Qt5 COMPONENTS Core Widgets OpenGL Xml
+# REQUIRED) otherwise.
+#
 # Qt5 and Qt6 can be retrieved using versionless targets introduced in Qt5.15:
 # https://doc.qt.io/qt-6/cmake-qt5-and-qt6-compatibility.html#versionless-targets
 macro(find_qt_package)
@@ -12,10 +23,12 @@ macro(find_qt_package)
     set(MY_OPTIONS_COMPONENTS "")
   endif()
 
-  find_package(
-    Qt6
-    COMPONENTS ${MY_OPTIONS_COMPONENTS}
-    QUIET)
+  if(NOT QT_DEFAULT_MAJOR_VERSION OR QT_DEFAULT_MAJOR_VERSION STREQUAL "6")
+    find_package(
+      Qt6
+      COMPONENTS ${MY_OPTIONS_COMPONENTS}
+      QUIET)
+  endif()
   if(NOT Qt6_FOUND)
     if(${MY_OPTIONS_REQUIRED})
       find_package(
@@ -27,3 +40,8 @@ macro(find_qt_package)
     endif()
   endif()
 endmacro()
+
+# see find_qt_package
+macro(find_qt_dependency)
+  find_qt_package(${ARGN})
+endmacro()