Content of RPM avahi-devel-0.7-27.el8.x86_64.rpm :
/usr/include/avahi-client
/usr/include/avahi-client/client.h
/usr/include/avahi-client/lookup.h
/usr/include/avahi-client/publish.h
/usr/include/avahi-common
/usr/include/avahi-common/address.h
/usr/include/avahi-common/alternative.h
/usr/include/avahi-common/cdecl.h
/usr/include/avahi-common/defs.h
/usr/include/avahi-common/domain.h
/usr/include/avahi-common/error.h
/usr/include/avahi-common/gccmacro.h
/usr/include/avahi-common/llist.h
/usr/include/avahi-common/malloc.h
/usr/include/avahi-common/rlist.h
/usr/include/avahi-common/simple-watch.h
/usr/include/avahi-common/strlst.h
/usr/include/avahi-common/thread-watch.h
/usr/include/avahi-common/timeval.h
/usr/include/avahi-common/watch.h
/usr/include/avahi-core
/usr/include/avahi-core/core.h
/usr/include/avahi-core/log.h
/usr/include/avahi-core/lookup.h
/usr/include/avahi-core/publish.h
/usr/include/avahi-core/rr.h
/usr/lib64/libavahi-client.so
/usr/lib64/libavahi-common.so
/usr/lib64/libavahi-core.so
/usr/lib64/pkgconfig/avahi-client.pc
/usr/lib64/pkgconfig/avahi-core.pc