purge obsolete project (qt < 5.15)

CMakeLists.txt

@@ -105,7 +105,7 @@ find_package(Qt5Gui REQUIRED)
 find_package(Qt5Qml REQUIRED)
 find_package(Qt5Quick REQUIRED)
 
-set(QT_MIN_VERSION 5.12.0)
+set(QT_MIN_VERSION 5.15.0)
 find_package(Qt5QuickControls2 ${QT_MIN_VERSION} REQUIRED)
 
 if(ANDROID)
@@ -173,8 +173,8 @@ endif()
 
 add_definitions(-DAPP_VERSION="${APP_VERSION}")
 
-if(Qt5Core_VERSION VERSION_LESS 5.15.0)
-    qt5_add_resources(osmin-resources gui/osmin_controls2_509.qrc)
+if(Qt5Core_VERSION VERSION_LESS 5.15.2)
+    message(FATAL_ERROR "Qt version not supported")
 else()
     qt5_add_resources(osmin-resources gui/osmin_controls2_515.qrc)
 endif()

README.md

@@ -17,11 +17,11 @@ You can install osmin through the [IzzyOnDroid](https://apt.izzysoft.de/fdroid/i
 Alternatively the APKs are available on the Release page, for armv7(32bits) and arm64(64bits) devices.
 
 ## Develop/debug osmin
-You can build and test osmin on Unix (Linux, BSD, MacOS 10.14) supported by Qt 5.12. Before build from source you have to install the following dependencies.
+You can build and test osmin on Unix (Linux, BSD, MacOS 10.14) supported by Qt 5.15. Before build from source you have to install the following dependencies.
 
-git, cmake, clang/clang++ (**>=12.0**), OpenMP, Qt5Core (**>=5.12**), Qt5Gui, Qt5Qml, Qt5Quick, Qt5QuickControls2, Qt5Widgets, Qt5Xml, Qt5Svg, Qt5Network, Qt5Sensors, Qt5Multimedia, Qt5RemoteObjects, Qt5Positioning.
+git, cmake, clang/clang++ (**>=12.0**), OpenMP, Qt5Core (**>=5.15**), Qt5Gui, Qt5Qml, Qt5Quick, Qt5QuickControls2, Qt5Widgets, Qt5Xml, Qt5Svg, Qt5Network, Qt5Sensors, Qt5Multimedia, Qt5RemoteObjects, Qt5Positioning.
 
-As example type the following on Ubuntu (>=20.04) to install all requirements.
+As example type the following on Ubuntu (>=22.04) to install all requirements.
 ```
 sudo apt install git cmake clang curl wget libomp-dev liblzma-dev libqt5remoteobjects5-bin libqt5quickwidgets5 libqt5quickcontrols2-5 libqt5qmlmodels5 libqt5qml5 libqt5positioning5 libqt5remoteobjects5-dev libqt5svg5-dev libqt5sensors5-dev qtquickcontrols2-5-dev qtmultimedia5-dev qtpositioning5-dev qml-module-qtgraphicaleffects qml-module-qtquick2 qml-module-qtquick-layouts qml-module-qtquick-controls2 qml-module-qt-labs-settings
 ```