# Add ldconfig to build instructions? **URL:** \ **Category:** GNU Radio\ **Created:** [February 28, 2013, 7:50am UTC](https://www.ruby-forum.com/t/add-ldconfig-to-build-instructions/227003 "2013-02-28T07:50:24Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Ralph\_ASSchmidS\_dk](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/91b2a8/32.png) [@Ralph\_ASSchmidS\_dk](https://www.ruby-forum.com/u/Ralph_ASSchmidS_dk)\ **Post date:** [February 28, 2013, 7:50am UTC](https://www.ruby-forum.com/t/add-ldconfig-to-build-instructions/227003/1 "2013-02-28T07:50:24Z")
Hi, My problems a few days ago, when switching between branches, simply came from a missing “sudo ldconfig” at the end of the procedure. Maybe it may be useful to add a more obvious hint? In [http://gnuradio.org/redmine/projects/gnuradio/wiki/BuildGuide](http://gnuradio.org/redmine/projects/gnuradio/wiki/BuildGuide) it is not mentioned, and in [http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall](http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall) only in the broken libtool section. Of course, the pro should know it, but for beginners this is a PITA, and the error message regarding the python path is very misleading. I can’t validate if this is a (K)Ubuntu problem or a more common cause for trouble… With best regards Ralph. – Ralph A. Schmid Mondstr. 10 90762 Frth +49-171-3631223 removed\_email\_address@domain.invalid [http://www.bclog.de/](http://www.bclog.de/) ---
**Author:** ![Ralph\_ASSchmidS\_dk](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/91b2a8/32.png) [@Ralph\_ASSchmidS\_dk](https://www.ruby-forum.com/u/Ralph_ASSchmidS_dk)\ **Post date:** [February 28, 2013, 3:11pm UTC](https://www.ruby-forum.com/t/add-ldconfig-to-build-instructions/227003/2 "2013-02-28T15:11:36Z")
On Thu, Feb 28, 2013 at 1:45 AM, Ralph A. Schmid, dk5ras [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Of course, the pro should know it, but for beginners this is a PITA, and the > error message regarding the python path is very misleading. > > I can’t validate if this is a (K)Ubuntu problem or a more common cause for > trouble… > > With best regards > > Ralph. Ralph, I switch between versions of GNU Radio constantly on my machines and haven’t had to run ldconfig by hand in a long time. It might be a specific Kubuntu issue (I run Ubuntu) or something about your environment or shell that you run. Still, adding a line in there as a hint that if you see a particular problem to try running ldconfig in the build instructions. Remember, [gnuradio.org](http://gnuradio.org) is a community page and you can edit it yourself. Just follow these steps: [http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-can-I-post-on-this-wiki-use-the-bug-tracker](http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-can-I-post-on-this-wiki-use-the-bug-tracker) On the other hand, you could look at this link: [http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#Experts-only-How-can-I-deliberately-install-GNU-Radio-multiple-times-different-versions](http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#Experts-only-How-can-I-deliberately-install-GNU-Radio-multiple-times-different-versions) Tom ---
**Author:** ![Ralph\_ASSchmidS\_dk](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/91b2a8/32.png) [@Ralph\_ASSchmidS\_dk](https://www.ruby-forum.com/u/Ralph_ASSchmidS_dk)\ **Post date:** [February 28, 2013, 4:09pm UTC](https://www.ruby-forum.com/t/add-ldconfig-to-build-instructions/227003/3 "2013-02-28T16:09:28Z")
> Ralph, > > I switch between versions of GNU Radio constantly on my machines and > haven’t had to run ldconfig by hand in a long time. It might be a specific > Kubuntu issue (I run Ubuntu) or something about your environment or shell > that you run. OK, I see. The system is relatively unmodified, so it may really be a Kubuntu issue. People call Windows a dll hell, but Linux obviously can grow similar behavior. > Still, adding a line in there as a hint that if you see a particular > problem to try > running ldconfig in the build instructions. Remember, [gnuradio.org](http://gnuradio.org) is a > community page and you can edit it yourself. Just follow these steps: > [http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-can-I-post-](http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-can-I-post-) > on-this-wiki-use-the-bug-tracker I know, in fact in other projects I add stuff all the time, but I do not want to add anything that is not useful for many people. > On the other hand, you could look at this link: > [http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#Experts-only-How-can-](http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#Experts-only-How-can-) > I-deliberately-install-GNU-Radio-multiple-times-different-versions This seems to be the right direction… > Tom Ralph.