# Query about GNU installation

**URL:** <https://www.ruby-forum.com/t/query-about-gnu-installation/233407>\
**Category:** GNU Radio\
**Created:** [December 11, 2014, 5:49am UTC](https://www.ruby-forum.com/t/query-about-gnu-installation/233407 "2014-12-11T05:49:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**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:** [December 11, 2014, 5:49am UTC](https://www.ruby-forum.com/t/query-about-gnu-installation/233407/1 "2014-12-11T05:49:31Z")

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I already installed GNU Radio after installing UHD drivers only. While  
executing cmake …/ command, it’s showing all the blocks but when I  
tried  
to open GRC, it shows very few blocks. For better understanding I  
enclosed  
a screenshot of GRC.

My doubt is where did I install libuhd packets.?  
If it was happened, how can I remove those libuhd packets? Please let me  
know.

As I am a beginner, please reply me clearly.

Thanks & Regards  
_B. Siva Kumar Reddy_

_Research Scholar_  
_Department of ECE_  
_National Institute of Technology Warangal (NITW)_  
_Andhra Pradesh, India-506004_  
\*09948065756 \*

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**Author:** ![sivakumar\_r](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/74df32/32.png) [@sivakumar\_r](https://www.ruby-forum.com/u/sivakumar_r)\
**Post date:** [December 11, 2014, 3:25pm UTC](https://www.ruby-forum.com/t/query-about-gnu-installation/233407/2 "2014-12-11T15:25:58Z")

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Hi Siva Kumar,

this looks like all the blocks are installed, but you were trying to  
open a GRC flowgraph that was made for an old version of GNU Radio.  
All the blocks used should still be there, but they have different  
names, and therefore GRC can’t find them.

for example, the gr\_sig\_source is the signal source; you will find  
modern versions of the blocks when you click the search button  
(magnifier top right) and search for parts of the missing block’s name.

Greetings,  
Marcus