MISC: Some changes done to cmake files

- Get ride of some unused parts of the CMakeLists.txt
- Add a basic README with at least the packages for ubuntu
- Make libraries 'REQUIRED' in the cmake file -> kubat proof
- Make the C++ standard to be C++17, maybe C++ 20 in the future

CMakeLists.txt

 cmake_minimum_required(VERSION 3.5)
 
-project(Vivy VERSION 0.1 LANGUAGES CXX)
+project(Vivy VERSION 0.1)
 
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
@@ -8,30 +8,17 @@ set(CMAKE_AUTOUIC ON)
 set(CMAKE_AUTOMOC ON)
 set(CMAKE_AUTORCC ON)
 
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-# QtCreator supports the following variables for Android, which are identical to qmake Android variables.
-# Check https://doc.qt.io/qt/deployment-android.html for more information.
-# They need to be set before the find_package( ...) calls below.
-
-#if(ANDROID)
-#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
-#    if (ANDROID_ABI STREQUAL "armeabi-v7a")
-#        set(ANDROID_EXTRA_LIBS
-#            ${CMAKE_CURRENT_SOURCE_DIR}/path/to/libcrypto.so
-#            ${CMAKE_CURRENT_SOURCE_DIR}/path/to/libssl.so)
-#    endif()
-#endif()
-
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 
 find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets REQUIRED)
 find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets REQUIRED)
-find_library(AVCODEC_LIBRARY avcodec)
-find_library(AVUTIL_LIBRARY avutil)
-find_library(SWRESAMPLE_LIBRARY swresample)
-find_library(AVFORMAT_LIBRARY avformat)
+find_library(AVCODEC_LIBRARY avcodec REQUIRED)
+find_library(AVUTIL_LIBRARY avutil REQUIRED)
+find_library(SWRESAMPLE_LIBRARY swresample REQUIRED)
+find_library(AVFORMAT_LIBRARY avformat REQUIRED)
 
 set(PROJECT_SOURCES
     main.cpp
@@ -50,17 +37,11 @@ if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
         MANUAL_FINALIZATION
         ${PROJECT_SOURCES}
     )
-else()
-    if(ANDROID)
-        add_library(Vivy SHARED
-            ${PROJECT_SOURCES}
-        )
 else()
     add_executable(Vivy
         ${PROJECT_SOURCES}
     )
 endif()
-endif()
 
 target_link_libraries(Vivy PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
 target_link_libraries(Vivy PRIVATE ${AVCODEC_LIBRARY})

README.md

+# Vivy
+
+## Build
+
+Vivy depends on Qt5, libav and more. On ubuntu install the following
+packages: `qtbase5-dev qtchooser qt5-qmake qtbase5-dev-tools
+libavutil-dev libavcodec-dev libavformat-dev`.
+
+## TODO!