start the 3rd assignment

meson.build

@@ -3,6 +3,7 @@ project('sernatur',
 	version: '1.0.0',
 	license: 'BSD-3',
 	default_options: [
+		'c_std=c11',
 		'b_ofast=if-release',
 		'b_march_native=if-release',
 		'b_ndebug=if-release'
@@ -10,12 +11,19 @@ project('sernatur',
 )
 add_global_arguments('-DGETTEXT_PACKAGE="sernatur"', language: 'c')
 
+debugging = get_option('debugging')
+if debugging
+	add_global_arguments('-DDEBUG', language : 'c')
+	add_global_arguments('-D', 'DEBUG', language : 'vala')
+endif
+
 add_project_arguments(['--vapidir',
-	join_paths(meson.current_source_dir(), 'src/vapi')],
+	join_paths(meson.current_source_dir(), 'vapi')],
 	language: 'vala')
 
 subdir('po')
 subdir('data')
+subdir('lib')
 subdir('src')
 subdir('doc')
 subdir('script')