gdbus_codegen: Support arbitrary extra arguments

docs/markdown/Gnome-module.md

@@ -234,6 +234,7 @@ one XML file.
 * `sources`: list of XML files
 * `interface_prefix`: prefix for the interface
 * `namespace`: namespace of the interface
+* `extra_args`: (*Added 0.47.0*) additional command line arguments to pass
 * `object_manager`: *(Added 0.40.0)* if true generates object manager code
 * `annotations`: *(Added 0.43.0)* list of lists of 3 strings for the annotation for `'ELEMENT', 'KEY', 'VALUE'`
 * `docbook`: *(Added 0.43.0)* prefix to generate `'PREFIX'-NAME.xml` docbooks

mesonbuild/modules/gnome.py

@@ -881,7 +881,8 @@ This will become a hard error in the future.''')
 
     @FeatureNewKwargs('build target', '0.46.0', ['install_header', 'install_dir', 'sources'])
     @FeatureNewKwargs('build target', '0.40.0', ['build_by_default'])
-    @permittedKwargs({'interface_prefix', 'namespace', 'object_manager', 'build_by_default',
+    @FeatureNewKwargs('build target', '0.47.0', ['extra_args'])
+    @permittedKwargs({'interface_prefix', 'namespace', 'extra_args', 'object_manager', 'build_by_default',
                       'annotations', 'docbook', 'install_header', 'install_dir', 'sources'})
     def gdbus_codegen(self, state, args, kwargs):
         if len(args) not in (1, 2):
@@ -890,6 +891,8 @@ This will become a hard error in the future.''')
         xml_files = args[1:]
         target_name = namebase + '-gdbus'
         cmd = [self.interpreter.find_program_impl('gdbus-codegen')]
+        extra_args = mesonlib.stringlistify(kwargs.pop('extra_args', []))
+        cmd += extra_args
         if 'interface_prefix' in kwargs:
             cmd += ['--interface-prefix', kwargs.pop('interface_prefix')]
         if 'namespace' in kwargs: