use wxWidget as external package

Signed-off-by: Peter Siegmund <mars3142@noreply.mars3142.dev>

CMakeLists.txt

@@ -1,16 +1,37 @@
 cmake_minimum_required(VERSION 3.14)
 
-project(wx_wherigo)
+project(wx_wherigo LANGUAGES CXX)
+
+include(FetchContent)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+set(wxBUILD_SHARED OFF)
+
+message(STATUS "Fetching wxWidgets...")
+
+FetchContent_Declare(
+        wxWidgets
+        GIT_REPOSITORY https://github.com/wxWidgets/wxWidgets.git
+        GIT_TAG v3.3.1
+        GIT_SHALLOW ON
+)
+FetchContent_MakeAvailable(wxWidgets)
+
+message(STATUS "Configure project....")
+
+set(SRCS
+        src/main.cpp
+        src/MyFrame.cpp
+        src/WxWherigo.cpp
+)
 
-add_subdirectory(libs/wxWidgets-3.3.1)
 include_directories(include)
-add_executable(${PROJECT_NAME}
-    src/main.cpp
-    src/MyFrame.cpp
-    src/WxWherigo.cpp
-)
+add_executable(${PROJECT_NAME} ${SRCS})
 target_link_libraries(${PROJECT_NAME}
-    wx::net
-    wx::core
-    wx::base
+        PRIVATE
+        wxcore
+        wxnet
+        wxbase
 )