Packages are failing to build with autoconf-2.71, which is part of a wide Fedora change. Please see the attached copr: https://copr.fedorainfracloud.org/coprs/odubaj/autoconf-2.70/packages/. More information about testing your package when building with autoconf available here: https://fedoraproject.org/wiki/Changes/Autoconf_271#How_To_Test All updates will be available in the given change proposal and this tracker.
It looks like the new autoconf requires gtk-doc for this configure.ac. It should be fixed now.
Probably wrong bugzilla to close.
Autoconf-2.71 Fedora Change is completed. According to this, I am closing this tracker and if any FTBFS will appear in Fedora Rawhide, new F36FTBFS tracker will be created for this purposes, thank all of you for cooperation.