include upstream patch to fix gdbus-codegen with meson 0.46

00-fix-gdbus-codegen.patch

@@ -0,0 +1,13 @@
+diff --git a/gio/gdbus-2.0/codegen/codegen_main.py b/gio/gdbus-2.0/codegen/codegen_main.py
+index 9d9099f..1cfe7c1 100755
+--- a/gio/gdbus-2.0/codegen/codegen_main.py
++++ b/gio/gdbus-2.0/codegen/codegen_main.py
+@@ -209,7 +209,7 @@ def codegen_main():
+             print_error('Using --body requires --output')
+ 
+         c_file = args.output
+-        header_name = os.path.splitext(c_file)[0] + '.h'
++        header_name = os.path.splitext(os.path.basename(c_file))[0] + '.h'
+ 
+     all_ifaces = []
+     for fname in args.files + args.xml_files:

glib2.spec

@@ -5,13 +5,17 @@
 
 Name: glib2
 Version: 2.56.1
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: A library of handy utility functions
 
 License: LGPLv2+
 URL: http://www.gtk.org
 Source0: http://download.gnome.org/sources/glib/2.56/glib-%{version}.tar.xz
 
+# Include upstream patch to fix gdbus-codegen when used with meson 0.46
+# https://gitlab.gnome.org/GNOME/glib/commit/cd1f82d8fc741a2203582c12cc21b4dacf7e1872
+Patch0: 00-fix-gdbus-codegen.patch
+
 BuildRequires: chrpath
 BuildRequires: gettext
 BuildRequires: perl-interpreter
@@ -217,6 +221,9 @@ glib-compile-schemas %{_datadir}/glib-2.0/schemas &> /dev/null || :
 %{_datadir}/installed-tests
 
 %changelog
+* Sun May 13 2018 Fabio Valentini <decathorpe@gmail.com> - 2.56.1-2
+- Include upstream patch to fix gdbus-codegen with meson 0.46.
+
 * Sun Apr 08 2018 Kalev Lember <klember@redhat.com> - 2.56.1-1
 - Update to 2.56.1