# Installing gr-ettus **URL:** \ **Category:** GNU Radio\ **Created:** [March 13, 2015, 6:57pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564 "2015-03-13T18:57:04Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Post date:** [March 13, 2015, 6:57pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564/1 "2015-03-13T18:57:04Z")
Hi, I’m trying to install gr-ettus on an E310. I previously installed a new version of UHD (to support RFNoC) in the directory /opt/uhd I would like to install gr-ettus into the existing version of gnuradio that is installed. Inside the build directory of gr-ettus, when I type “cmake …/” I get the following message and error: – Found UHD: /usr/lib/libuhd.so CMake Error at CMakeLists.txt:108 (message): RFNoC not found. When I had installed UHD, I followed the steps in [1], and made sure that the new libuhd.so was in my LD\_LIBRARY\_PATH and I added the new path to /etc/ld.so.conf; however, when I ran ldconfig I got the following error: ldconfig: /usr/lib/libstdc++.so.6.0.20-gdb.py is not an ELF file - it has the wrong magic bytes at the start. I had ignored that error, partly because I didn’t understand it, and partly because I had already updated the LD\_LIBRARY\_PATH variable. Was it a mistake to ignore it? I welcome any advice on installing gnuradio out-of-tree modules (such as gr-ettus mentioned in [2]), and advice on managing different versions of UHD on the same system. I can’t seem to get the gr-ettus installation to look at the new version of UHD. Note: I am using the E310 Dizzy build [3]. Thanks! -ben [1] [USRP Hardware Driver and USRP Manual: Building and Installing UHD from source](http://files.ettus.com/manual/page_build_guide.html) [2] [Home · EttusResearch/uhd Wiki · GitHub](https://github.com/EttusResearch/uhd/wiki/RFNoC:-Getting-Started) [3] [files.ettus.com:/e3xx\_images/beta/dizzy-test/](http://files.ettus.com/e3xx_images/beta/dizzy-test/) ---
**Author:** ![Ben\_Lapointe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/4da419/32.png) [@Ben\_Lapointe](https://www.ruby-forum.com/u/Ben_Lapointe)\ **Post date:** [March 13, 2015, 7:13pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564/2 "2015-03-13T19:13:53Z")
Ben, you _must_ use the right branch of UHD (which I know you’ve been using). For cross-compiling, you need to make sure that _all_ the CMake vars starting with UHD\_ are correctly set. Are you using our SDK? If yes, it’s probably pointing to the SDK’s default UHD. M ---
**Author:** ![Ben\_Lapointe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/4da419/32.png) [@Ben\_Lapointe](https://www.ruby-forum.com/u/Ben_Lapointe)\ **Post date:** [March 13, 2015, 8:10pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564/3 "2015-03-13T20:10:13Z")
Martin, I am not using the SDK. The steps I have taken so far: Created a new SD card from the dizzy dev image found at [1]. Followed the steps at [2] to clone the RFNoC git repository, switch to rfnoc-devel branch, build it, install it to /opt/uhd My next challenge was to install the gr-ettus OOT module to be able to use the RFNoC blocks in GRC. The dizzy image already had a previous install of UHD and GNU RADIO. For RFNoC I installed a new UHD with the RFNoC branch. I was hoping to add gr-ettus to the existing GNU RADIO install, to simplify things. I am doing all of this on the E310. Is this the right way to do it? I assumed that I didn’t need the SDK because I already had an SD image built. Thanks, -ben [1] [files.ettus.com:/e3xx\_images/beta/dizzy-test/](http://files.ettus.com/e3xx_images/beta/dizzy-test/) [2] [Home · EttusResearch/uhd Wiki · GitHub](https://github.com/EttusResearch/uhd/wiki/RFNoC:-Getting-Started) On Fri, Mar 13, 2015 at 2:12 PM, Martin B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![Ben\_Lapointe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/4da419/32.png) [@Ben\_Lapointe](https://www.ruby-forum.com/u/Ben_Lapointe)\ **Post date:** [March 13, 2015, 10:15pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564/4 "2015-03-13T22:15:45Z")
I didn’t realize you were doing on this on the device. If you have all the PATHs set up correctly, you should be good, but it looks like you’re using the default UHD. Have a look at your CMake cache (in gr-ettus) and see where the UHD\_\* vars point to. They’re ‘advanced’ vars, in case you can’t see them immediately. Cheers, M ---
**Author:** ![Ben\_Lapointe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/4da419/32.png) [@Ben\_Lapointe](https://www.ruby-forum.com/u/Ben_Lapointe)\ **Post date:** [March 13, 2015, 10:18pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564/5 "2015-03-13T22:18:17Z")
And you must have rfnoc-devel branch of UHD installed. This is not on the default image. M ---
**Author:** ![Ben\_Lapointe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/4da419/32.png) [@Ben\_Lapointe](https://www.ruby-forum.com/u/Ben_Lapointe)\ **Post date:** [March 13, 2015, 10:54pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564/6 "2015-03-13T22:54:20Z")
On 03/13/2015 05:16 PM, Martin B. wrote: > And you must have rfnoc-devel branch of UHD installed. This is not on > the default image. Somewhere we have a toolchain file for cmake to build natively? Otherwise the default flags are for older arms and no neon. Philip ---
**Author:** ![Ben\_Lapointe](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/4da419/32.png) [@Ben\_Lapointe](https://www.ruby-forum.com/u/Ben_Lapointe)\ **Post date:** [March 13, 2015, 11:06pm UTC](https://www.ruby-forum.com/t/installing-gr-ettus/234564/7 "2015-03-13T23:06:53Z")
I run gr-ettus on E300 all the time using the GNU Radio toolchain file. You have to set UHD\_INCLUDE\_DIRS and UHD\_LIBRARIES, though. M