unbound-libs creates dependency on python2 even though there seems to be no need for such a requires.
[fedora@localhost ~]$ rpm -q unbound-libs --requires | grep python
No file from unbound-libs doesn't seem to use python in any way. Linking to libpython is from libunbound.so.
[fedora@localhost ~]$ ldd /usr/lib64/libunbound.so.2 | grep python
libpython2.7.so.1.0 => /lib64/libpython2.7.so.1.0 (0x00007fb8a7d18000)
libtool: link: gcc -I. -I/usr/include/python2.7 -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -fPIE -pie -flto -pthread -Wl,-z -Wl,relro -Wl,-z -Wl,now -pie -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -o .libs/unbound-host .libs/unbound-host.o .libs/keyraw.o .libs/sbuffer.o .libs/wire2str.o .libs/parse.o .libs/parseutil.o .libs/rrdef.o .libs/str2wire.o .libs/strlcat.o .libs/strlcpy.o -L. -L.libs /builddir/build/BUILD/unbound-1.5.4/unbound-1.5.4_python2/.libs/libunbound.so -lssl -levent -ldl -lpython2.7 -lcrypto -pthread
My proposal is to package libunbound.so from python3 build of unbound.
I think the libunbound.so should not be linked with python if not really necessary. I'll have to investigate if there is some good reason for that.
There seems to be $LIBS variable in Makefile which includes '-lpythonX.Y' and is used everywhere. I'm investigating possible change.
In the meantime I reported this to upstream:
Preferring Python3 build over Python2 for now. Leaving the ticket open.
unbound-1.5.4-4.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2015-15039
unbound-1.5.4-4.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report.\nIf you want to test the update, you can install it with \n su -c 'yum --enablerepo=updates-testing update unbound'. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2015-15039
unbound-1.5.4-4.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.