i have installed osmo-TRX
OsmoTRX is not needed for the MS SDR PHY.
UHD Driver, Gr-gsm and Gnuradio from ubuntu package manager.
I would not recommend to use these binary packages because Ubuntu usually has ancient versions of them. Not sure about 18.04 though, maybe it's not that bad.
i got this problem: on make [...]
Alternatively you can build everything in Docker:
https://osmocom.org/projects/osmocom-bb-sdr-phy/wiki/Docker_images
With best regards, Vadim Yanitskiy.