osmo-trx with USRP1 - libusrp vs. UHD

Hi! I played with osmo-trx today and tried to run it with a USRP1 that I have laying around, though to no avail. osmo-trx supports two kinds of devices, USRP1 via libusrp and UHD. libusrp was last included in gnuradio 3.4.2[1] from Dec 2013, it unsurprisingly does not build on a recent Linux distribution, due to API incompatibilities with boost. The USRP1 would theoretically be supported by UHD, though the device initialization code in osmo-trx explicitly treats it differently, see [2,3]. I found an old ML post[4] from 2015 that pretty much asks the same question but did not get an answer. Supposedly there is a simple reason why USRP1 is not driven via UHD in osmo-trx, but I don't know. Can somebody please enlighten me? Tom, maybe you? I would like to understand whether it is feasible to use an USRP1 with UHD for osmo-trx or one would have to go down the rabbit hole to build libusrp on a modern system. Kind regards, -Alex [1] https://gnuradio.org/releases/gnuradio/ [2] https://git.osmocom.org/osmo-trx/tree/Transceiver52M/UHDDevice.cpp#n512 [3] https://git.osmocom.org/osmo-trx/tree/Transceiver52M/USRPDevice.cpp [4] https://lists.osmocom.org/pipermail/openbsc/2015-January/000058.html