Install generated gdbus header with old glib version too.

mesonbuild/modules/gnome.py

@@ -959,11 +959,15 @@ This will become a hard error in the future.''')
                 self._print_gdbus_warning()
                 cmd += ['--generate-c-code', '@OUTDIR@/' + namebase, '@INPUT@']
             outputs = [namebase + '.c', namebase + '.h']
+            install = kwargs.get('install_header', False)
             custom_kwargs = {'input': xml_files,
                              'output': outputs,
                              'command': cmd,
-                             'build_by_default': build_by_default
+                             'build_by_default': build_by_default,
+                             'install': install,
                              }
+            if install and 'install_dir' in kwargs:
+                custom_kwargs['install_dir'] = [False, kwargs['install_dir']]
             ct = build.CustomTarget(target_name, state.subdir, state.subproject, custom_kwargs)
             # Ensure that the same number (and order) of arguments are returned
             # regardless of the gdbus-codegen (glib) version being used

test cases/frameworks/7 gnome/gdbus/meson.build

@@ -14,7 +14,9 @@ gdbus_src = gnome.gdbus_codegen('generated-gdbus',
   annotations : [
     ['com.example.Hello()', 'org.freedesktop.DBus.Deprecated', 'true']
   ],
-  docbook : 'generated-gdbus-doc'
+  docbook : 'generated-gdbus-doc',
+  install_header : true,
+  install_dir : get_option('includedir')
 )
 assert(gdbus_src.length() == 3, 'expected 3 targets')
 

test cases/frameworks/7 gnome/installed_files.txt

@@ -15,3 +15,4 @@ usr/share/gir-1.0/MesonDep2-1.0.gir
 usr/share/glib-2.0/schemas/com.github.meson.gschema.xml
 usr/share/simple-resources.gresource
 usr/include/simple-resources.h
+usr/include/generated-gdbus.h