Raise minimum CMake version, use GNUInstallDirs

CMakeLists.txt

@@ -1,5 +1,6 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.5)
 project(qcustomplot)
+include(GNUInstallDirs)
 
 set(LIB_VER "" CACHE STRING "Library version")
 set(QT_VER "6" CACHE STRING "Target Qt version")
@@ -23,12 +24,12 @@ endif()
 target_link_libraries(qcustomplot Qt${QT_VER}::Core Qt${QT_VER}::Gui Qt${QT_VER}::Widgets Qt${QT_VER}::PrintSupport)
 
 install(TARGETS qcustomplot
-  RUNTIME DESTINATION bin
-  LIBRARY DESTINATION lib${LIB_SUFFIX}
-  ARCHIVE DESTINATION lib${LIB_SUFFIX}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
 )
 
 # Headers
 install(FILES qcustomplot.h
-  DESTINATION include
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )

qcustomplot.spec

@@ -12,7 +12,7 @@
 
 Name:           qcustomplot
 Version:        2.1.1
-Release:        11%{?dist}
+Release:        12%{?dist}
 Summary:        Qt widget for plotting and data visualization
 
 License:        GPL-3.0-or-later
@@ -171,6 +171,9 @@ EOF
 
 
 %changelog
+* Thu Jul 17 2025 Sandro Mani <manisandro@gmail.com> - 2.1.1-12
+- Raise minimum CMake version, use GNUInstallDirs
+
 * Sat Jan 18 2025 Fedora Release Engineering <releng@fedoraproject.org> - 2.1.1-11
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild