Add cmake project files for cpp/ directory and all relevant subdirecctories

+ Add Makefiles generated by CMake JIC make is preferred
+ Update cmake version, header comments, and project descriptions

cpp/sdl-invaders/CMakeLists.txt

@@ -0,0 +1,70 @@
+###############################################################################
+## Author: Shaun Reed                                                        ##
+## Legal: All Content (c) 2019 Shaun Reed, all rights reserved               ##
+##                                                                           ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0  ##
+##############################################################################
+# Root CMakeLists.txt of cpp practice 4-inheritance
+
+# Define CMake version
+cmake_minimum_required(VERSION 3.15)
+
+project(       # Define project
+  inheritance  # Project name
+  DESCRIPTION  "Example project for class inheritance"
+  LANGUAGES    CXX
+  )
+
+# Pass this to program to control debug output
+option (DB_CONF "Should we debug and configure files with cmake values?" ON)
+option (DB_BUILD "Should we run the build in debug mode?" OFF)
+option (EXE_BUILD "Should we build the executable?" ON)
+
+add_library(             # Add Library
+  lib-inherit            # Library Name
+  "src/lib-inherit.cpp"  # Sources..
+  "src/lib-inherit.h"
+)
+
+target_include_directories(        # When calling library, include a directory
+  lib-inherit                      # Library name
+  PUBLIC                           #
+    "${CMAKE_CURRENT_SOURCE_DIR}"  # Source directory of exe including our library
+)
+
+if (EXE_BUILD)
+  set(BUILD_STATUS "Building default executable")
+  include(FindPkgConfig)
+  pkg_search_module(SDL2 REQUIRED sdl2)
+  include_directories(${SDL2_INCLUDE_DIRS})
+
+  add_executable(         # Creating executable
+    inherited             # Exe name
+    "apps/inherited.cpp"  # Exe Source(s)
+  )
+  target_link_libraries(  # Linking the exe to library
+    inherited        # Executable to link
+    PRIVATE          #
+      lib-inherit    # Library to link
+      ${SDL2_LIBRARIES}
+  )
+elseif(DB_BUILD)
+  set(BUILD_STATUS "Building in debug mode")
+
+  # Create compile_commands.json for linter
+  set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+  target_compile_definitions(inherited PRIVATE BUILD_STATUS=${BUILD_STATUS})
+elseif(DB_CONF)
+  set(BUILD_STATUS "Building in debug mode, configuring files")
+
+  # Configure header file with CMake variables defined in src/lib-inherit.h.in
+  # @ONLY is specified, only variables of the form @VAR@ will be replaced and ${VAR} will be ignored.
+  # configure_file(src/lib-inherit.h src/lib-inherit.h @ONLY)
+  configure_file(apps/inherited.cpp apps/inherited.cpp @ONLY)
+ 
+  # Create compile_commands.json for linter
+  set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+endif()
+#target_compile_definitions(inherited PRIVATE BUILD_STATUS=${BUILD_STATUS})
+