Add native plugin build support (#10)

Fixed #3

templates/app/CMakeLists.txt.tmpl

@@ -3,7 +3,7 @@ project(runner LANGUAGES CXX)
 
 set(BINARY_NAME "{{projectName}}")
 
-cmake_policy(SET CMP0063 NEW)
+cmake_policy(SET CMP0079 NEW)
 
 set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
 

templates/plugin/CMakeLists.txt.tmpl

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.10)
 set(PROJECT_NAME "{{projectName}}")
 project(${PROJECT_NAME} LANGUAGES CXX)
 

templates/plugin/include/projectName.tmpl/pluginClassSnakeCase.h.tmpl

@@ -4,9 +4,9 @@
 #include <flutter_plugin_registrar.h>
 
 #ifdef FLUTTER_PLUGIN_IMPL
-#define FLUTTER_PLUGIN_EXPORT __declspec(dllexport)
+#define FLUTTER_PLUGIN_EXPORT __attribute__((visibility("default")))
 #else
-#define FLUTTER_PLUGIN_EXPORT __declspec(dllimport)
+#define FLUTTER_PLUGIN_EXPORT
 #endif
 
 #if defined(__cplusplus)