Fix the build with Python 3.9

Thanks Stephen Gallagher <sgallagh@redhat.com> for fixing this upstream!

https://bugzilla.redhat.com/show_bug.cgi?id=1817649

0001-Replace-calls-to-deprecated-xml.etree.cElementTree.patch

@@ -0,0 +1,45 @@
+From 8ceb23621d7e59718c1d512155aae8e8eb17db56 Mon Sep 17 00:00:00 2001
+From: Stephen Gallagher <sgallagh@redhat.com>
+Date: Thu, 26 Mar 2020 15:17:37 -0400
+Subject: [PATCH] Replace calls to deprecated xml.etree.cElementTree
+
+cElementTree was removed in Python 3.9 in favor of ElementTree,
+which has used a fast, native implementation since Python 3.3.
+
+Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1817649
+
+Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>
+---
+ giscanner/gdumpparser.py | 2 +-
+ giscanner/girparser.py   | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/giscanner/gdumpparser.py b/giscanner/gdumpparser.py
+index 1730fee5..e7ccf575 100644
+--- a/giscanner/gdumpparser.py
++++ b/giscanner/gdumpparser.py
+@@ -22,7 +22,7 @@ import os
+ import sys
+ import tempfile
+ import subprocess
+-from xml.etree.cElementTree import parse
++from xml.etree.ElementTree import parse
+ 
+ from . import ast
+ from . import message
+diff --git a/giscanner/girparser.py b/giscanner/girparser.py
+index 0a6c687b..35206a41 100644
+--- a/giscanner/girparser.py
++++ b/giscanner/girparser.py
+@@ -21,7 +21,7 @@
+ import os
+ 
+ from collections import OrderedDict
+-from xml.etree.cElementTree import parse
++from xml.etree.ElementTree import parse
+ 
+ from . import ast
+ from .girwriter import COMPATIBLE_GIR_VERSION
+-- 
+2.25.2
+

gobject-introspection.spec

@@ -4,13 +4,16 @@
 
 Name:           gobject-introspection
 Version:        1.64.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Introspection system for GObject-based libraries
 
 License:        GPLv2+, LGPLv2+, MIT
 URL:            https://wiki.gnome.org/Projects/GObjectIntrospection
 Source0:        https://download.gnome.org/sources/gobject-introspection/1.64/%{name}-%{version}.tar.xz
 
+# Fix the build with Python 3.9
+Patch0:         0001-Replace-calls-to-deprecated-xml.etree.cElementTree.patch
+
 BuildRequires:  gcc
 BuildRequires:  bison
 BuildRequires:  cairo-gobject-devel
@@ -86,6 +89,9 @@ Libraries and headers for gobject-introspection
 %{_mandir}/man1/g-ir-scanner.1*
 
 %changelog
+* Thu Mar 26 2020 Kalev Lember <klember@redhat.com> - 1.64.0-2
+- Fix the build with Python 3.9 (#1817649)
+
 * Sat Mar 07 2020 Kalev Lember <klember@redhat.com> - 1.64.0-1
 - Update to 1.64.0