uhd examples fails to run due to missing RFNoC XML blocks

[WHEBERTH]

When trying to run the example files shipped with Ettus UHD driver all we get is an error due to missing files related to RFNoC blocks as shown below:
It looks like the XML files are missing on the package.

ubuntu@ubuntu:/usr/lib/uhd/examples$ ./benchmark_rate --args="type=x300,addr=192.168.10.2" --channels="0,1" --rx_rate 200e6
linux; GNU C++ version 7.3.0; Boost_106501; UHD_003.010.003.000-0-unknown

Creating the usrp device with: type=x300,addr=192.168.10.2...
-- X300 initialization sequence...
-- Determining maximum frame size... 1472 bytes.
-- Setup basic communication...
-- Loading values from EEPROM...
-- Setup RF frontend clocking...
-- Radio 1x clock:200
Error: AssertionError: Failed to find a valid XML path for RFNoC blocks.
Try setting the enviroment variable UHD_RFNOC_DIR to the correct location

Versions:

ubuntu@ubuntu:/usr/lib/uhd/examples$ lsb_release -rd
Description: Ubuntu 18.04 LTS
Release: 18.04

ubuntu@ubuntu:/usr/lib/uhd/examples$ apt-cache policy libuhd003.010.003 libuhd-dev uhd-host
libuhd003.010.003:
  Installed: 3.10.3.0-2
  Candidate: 3.10.3.0-2
  Version table:
 *** 3.10.3.0-2 500
        500 http://ubuntu-archive.locaweb.com.br/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status
libuhd-dev:
  Installed: 3.10.3.0-2
  Candidate: 3.10.3.0-2
  Version table:
 *** 3.10.3.0-2 500
        500 http://ubuntu-archive.locaweb.com.br/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status
uhd-host:
  Installed: 3.10.3.0-2
  Candidate: 3.10.3.0-2
  Version table:
 *** 3.10.3.0-2 500
        500 http://ubuntu-archive.locaweb.com.br/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: uhd-host 3.10.3.0-2
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
CurrentDesktop: ubuntu:GNOME
Date: Mon Jul 9 12:06:53 2018
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: uhd
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Piotr Krysik (ptrkrysik)]

I can also confirm this problem. USRPs X310 seem to be unusable with distribution uhd packages due to this issue.

[WHEBERTH (wheberth)]

I am using a workaround to be able to use the X310 which is download the missing files manually and copy to the expected location.

$ wget https://codeload.github.com/EttusResearch/uhd/zip/release_003_010_003_000 -O uhd.zip
$ unzip uhd.zip
$ cd uhd-release_003_010_003_000/host/include
$ sudo cp -Rv uhd/rfnoc /usr/share/uhd/