# Error: GNURADIO filter not found, while making own custom block in gnuradio

**URL:** <https://www.ruby-forum.com/t/error-gnuradio-filter-not-found-while-making-own-custom-block-in-gnuradio/234472>\
**Category:** GNU Radio\
**Created:** [March 7, 2015, 6:01am UTC](https://www.ruby-forum.com/t/error-gnuradio-filter-not-found-while-making-own-custom-block-in-gnuradio/234472 "2015-03-07T06:01:53Z")\
**Posts on this page:** 3\
**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:** [March 7, 2015, 6:01am UTC](https://www.ruby-forum.com/t/error-gnuradio-filter-not-found-while-making-own-custom-block-in-gnuradio/234472/1 "2015-03-07T06:01:53Z")

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While making own custom block “derivative\_ff” using method specified in  
"  
[https://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModulesConfig](https://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModulesConfig)"  
on Gnuradio 3.7.3 and for OS ubuntu 4.10, following error struck me  
while  
compiling the file using “cmake …/”.  
abhishek@abhishek-Inspiron-N5110:~/gnuradio-master/gr-howto/build$ cmake  
…/  
– Build type not specified: defaulting to release.  
– Boost version: 1.55.0  
– Found the following Boost libraries:  
– filesystem  
– system  
Checking for GNU Radio Module: RUNTIME

- INCLUDES=/usr/local/include
- 

LIBS=/usr/local/lib/libgnuradio-runtime.so;/usr/local/lib/libgnuradio-pmt.so  
GNURADIO\_RUNTIME\_FOUND = TRUE  
Checking for GNU Radio Module: FILTER  
– checking for module ‘gnuradio-filter’  
– package ‘gnuradio-filter’ not found

- INCLUDES=GNURADIO\_FILTER\_INCLUDE\_DIRS-NOTFOUND
- LIBS=GNURADIO\_FILTER\_LIBRARIES\_gnuradio-filter-NOTFOUND  
– Could NOT find GNURADIO\_FILTER (missing: GNURADIO\_FILTER\_LIBRARIES  
GNURADIO\_FILTER\_INCLUDE\_DIRS)  
GNURADIO\_FILTER\_FOUND = FALSE  
CMake Error at /usr/local/lib/cmake/gnuradio/GnuradioConfig.cmake:110  
(message):  
Required GNU Radio Component: FILTER missing!  
Call Stack (most recent call first):  
/usr/local/lib/cmake/gnuradio/GnuradioConfig.cmake:127 (GR\_MODULE)  
CMakeLists.txt:93 (find\_package)

– Configuring incomplete, errors occurred!  
See also  
“/home/abhishek/gnuradio-master/gr-howto/build/CMakeFiles/CMakeOutput.log”.

Any suggestions will be appreciated,  
Thanks in advance,  
Abhishek.

---

<div class="post-metadata">

**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\
**Post date:** [March 7, 2015, 10:15am UTC](https://www.ruby-forum.com/t/error-gnuradio-filter-not-found-while-making-own-custom-block-in-gnuradio/234472/2 "2015-03-07T10:15:54Z")

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Hi Abhishek,

how did you install GNU Radio?  
Usually, gr-filter is available, but if some dependencies were missing  
at build time, it might have been omitted.

Greetings,  
Marcus

---

<div class="post-metadata">

**Author:** ![abhishek](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/7ba0ec/32.png) [@abhishek](https://www.ruby-forum.com/u/abhishek)\
**Post date:** [March 8, 2015, 3:48pm UTC](https://www.ruby-forum.com/t/error-gnuradio-filter-not-found-while-making-own-custom-block-in-gnuradio/234472/3 "2015-03-08T15:48:43Z")

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Hey Abhishek,

that sounds solvable 🙂  
Uninstall the Ubuntu GNU Radio version with apt-get remove, rebuild from  
source, install, and try again.

By the way, please reply to the emails on the mailing list, and not to  
the digest, and at least change the subject of the reply. I nearly  
missed your email because it had the subject “Discuss-gnuradio Digest,  
Vol 148, Issue 8” instead of “error: GNURADIO filter not found, while  
making own custom block in gnuradio”.

Greetings,  
Marcus