Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
libfilezilla-devel
libfilezilla-devel(x86-32)
pkgconfig(libfilezilla)

Requires :

/usr/bin/pkg-config
libfilezilla0 = 0.12.1-70.1
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1

Content of RPM :
/usr/include/libfilezilla
/usr/include/libfilezilla/apply.hpp
/usr/include/libfilezilla/buffer.hpp
/usr/include/libfilezilla/encode.hpp
/usr/include/libfilezilla/event.hpp
/usr/include/libfilezilla/event_handler.hpp
/usr/include/libfilezilla/event_loop.hpp
/usr/include/libfilezilla/file.hpp
/usr/include/libfilezilla/format.hpp
/usr/include/libfilezilla/glue
/usr/include/libfilezilla/glue/wx.hpp
/usr/include/libfilezilla/iputils.hpp
/usr/include/libfilezilla/libfilezilla.hpp
/usr/include/libfilezilla/local_filesys.hpp
/usr/include/libfilezilla/mutex.hpp
/usr/include/libfilezilla/optional.hpp
/usr/include/libfilezilla/private
/usr/include/libfilezilla/private/defs.hpp
/usr/include/libfilezilla/private/visibility.hpp
/usr/include/libfilezilla/private/windows.hpp
/usr/include/libfilezilla/process.hpp
/usr/include/libfilezilla/recursive_remove.hpp
/usr/include/libfilezilla/shared.hpp
/usr/include/libfilezilla/string.hpp
/usr/include/libfilezilla/thread.hpp
/usr/include/libfilezilla/thread_pool.hpp
/usr/include/libfilezilla/time.hpp
/usr/include/libfilezilla/uri.hpp
/usr/include/libfilezilla/util.hpp
/usr/include/libfilezilla/version.hpp
There is 610 files more in these RPM.