# Re-building the source code

**URL:** <https://www.ruby-forum.com/t/re-building-the-source-code/233643>\
**Category:** GNU Radio\
**Created:** [December 30, 2014, 5:50pm UTC](https://www.ruby-forum.com/t/re-building-the-source-code/233643 "2014-12-30T17:50:40Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**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 30, 2014, 5:50pm UTC](https://www.ruby-forum.com/t/re-building-the-source-code/233643/1 "2014-12-30T17:50:40Z")

</div>

Hi,  
I have changed things in udp\_source\_impl.cc, and I re-built the gnuradio  
as in the following instructions:  
cmake  
make  
sudo make install  
However, the changes that I did to udp\_source\_impl.cc did not work, it  
is still using the old version.

Could you please help me fix this issue.  
Thanks

---

<div class="post-metadata">

**Author:** ![Anis\_E](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/a698b9/32.png) [@Anis\_E](https://www.ruby-forum.com/u/Anis_E)\
**Post date:** [December 30, 2014, 6:14pm UTC](https://www.ruby-forum.com/t/re-building-the-source-code/233643/2 "2014-12-30T18:14:47Z")

</div>

On Tue, Dec 30, 2014 at 11:49 AM, Anis E. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> Could you please help me fix this issue.  
> Thanks

Changes to the source code don’t require you to rerun cmake, which could  
be  
setting the install prefix differently. It’s possible that you’ve  
installed  
your changes to a different prefix that you are not actually using now.

Tom