making clangd happy and making script to compile/build with run.sh

CMakeLists.txt

@@ -0,0 +1,25 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(documentviewer LANGUAGES CXX)
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets
+             OPTIONAL_COMPONENTS PrintSupport Pdf PdfWidgets)
+
+qt_standard_project_setup()
+
+add_compile_definitions(QT_NO_CAST_FROM_ASCII)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+if(TARGET Qt6::PrintSupport)
+    add_compile_definitions(QT_DOCUMENTVIEWER_PRINTSUPPORT)
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/demos/documentviewer")
+
+add_subdirectory(app)
+add_subdirectory(plugins)