# Avogadro Extensions in general **URL:** \ **Category:** General Discussion\ **Created:** [July 18, 2011, 3:40pm UTC](https://discuss.avogadro.cc/t/avogadro-extensions-in-general/194 "2011-07-18T15:40:19Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Charles\_Korb](https://discuss.avogadro.cc/letter_avatar_proxy/v4/letter/c/85e7bf/32.png) [@Charles\_Korb](https://discuss.avogadro.cc/u/Charles_Korb)\ **Post date:** [July 18, 2011, 3:40pm UTC](https://discuss.avogadro.cc/t/avogadro-extensions-in-general/194/1 "2011-07-18T15:40:19Z")
Hello all, I am running linux and I was trying to learn more about building Avogadro extensions as a precursor to actually making one myself. I found a few tutorials on the avogadro site ( [http://avogadro.openmolecules.net/api/dev/tpe-toc.html](http://avogadro.openmolecules.net/api/dev/tpe-toc.html) ) and I found the actual files on github ( [https://github.com/cryos/avogadro/tree/master/libavogadro/examples/thirdPartyExtensions](https://github.com/cryos/avogadro/tree/master/libavogadro/examples/thirdPartyExtensions) ). However, I cannot get the files to work using cmake. Using the CMakeLists.txt found on the github, I got this error: CMake Error at CMakeLists.txt:17 (include): include called with wrong number of arguments. Include only takes one file. CMake Error at CMakeLists.txt:37 (avogadro\_plugin): Unknown CMake command “avogadro\_plugin”. I assumed this had to do with not being able to find the Avogadro libraries so I wrote a findAvogadro.cmake file and then when that didn’t work I copied the findAvogadro file from a normal avogadro download which still didn’t work. Do you guys have any ideas or tips? Thank you very much, Charles Korb ---
**Author:** ![ghutchis](https://discuss.avogadro.cc/user_avatar/discuss.avogadro.cc/ghutchis/32/456_2.png) [@ghutchis](https://discuss.avogadro.cc/u/ghutchis)\ **Post date:** [July 18, 2011, 4:51pm UTC](https://discuss.avogadro.cc/t/avogadro-extensions-in-general/194/2 "2011-07-18T16:51:24Z")
On Jul 18, 2011, at 11:40 AM, Charles Korb wrote: > Hello all, > I am running linux and I was trying to learn more about building Avogadro extensions as a precursor to actually making one myself. I found a few tutorials on the avogadro site ( [Avogadro: Developing Third Party Extensions](http://avogadro.openmolecules.net/api/dev/tpe-toc.html) ) and I found the actual files on github ( [avogadro/libavogadro/examples/thirdPartyExtensions at master · cryos/avogadro · GitHub](https://github.com/cryos/avogadro/tree/master/libavogadro/examples/thirdPartyExtensions) ). However, I cannot get the files to work using cmake. Well, my first question would be what version of Cmake you have installed. But I think the main issue is whether you’ve actually _installed_ Avogadro. Running “make install” for Avogadro should install the findAvogadro.cmake module for Cmake to find. Hope that helps, -Geoff ---
**Author:** ![allison.vacanti](https://discuss.avogadro.cc/user_avatar/discuss.avogadro.cc/allison.vacanti/32/112_2.png) [@allison.vacanti](https://discuss.avogadro.cc/u/allison.vacanti)\ **Post date:** [July 18, 2011, 4:51pm UTC](https://discuss.avogadro.cc/t/avogadro-extensions-in-general/194/3 "2011-07-18T16:51:57Z")
Hi Charles, Have you installed avogadro on this system yet? Avogadro should install a file, AvogadroUse.cmake, that defines some CMake functions (like avogadro\_plugin). On my system it installs to /usr/lib/avogadro/1\_1/AvogadroUse.cmake – make sure that this file is on your system and is somewhere that CMake can find it. Dave On Mon, Jul 18, 2011 at 11:40 AM, Charles Korb [ckorb@mix.wvu.edu](mailto:ckorb@mix.wvu.edu) wrote: > Hello all, > I am running linux and I was trying to learn more about building Avogadro > extensions as a precursor to actually making one myself. I found a few > tutorials on the avogadro site ( > [Avogadro: Developing Third Party Extensions](http://avogadro.openmolecules.net/api/dev/tpe-toc.html) ) and I found the > actual files on github ( > [avogadro/libavogadro/examples/thirdPartyExtensions at master · cryos/avogadro · GitHub](https://github.com/cryos/avogadro/tree/master/libavogadro/examples/thirdPartyExtensions) > ). However, I cannot get the files to work using cmake. Using the > CMakeLists.txt found on the github, I got this error: > CMake Error at CMakeLists.txt:17 (include): > include called with wrong number of arguments. Include only takes one > file. > CMake Error at CMakeLists.txt:37 (avogadro\_plugin): > Unknown CMake command “avogadro\_plugin”. > > I assumed this had to do with not being able to find the Avogadro libraries > so I wrote a findAvogadro.cmake file and then when that didn’t work I copied > the findAvogadro file from a normal avogadro download which still didn’t > work. Do you guys have any ideas or tips? > Thank you very much, > Charles Korb > > * * * > > AppSumo Presents a FREE Video for the SourceForge Community by Eric > Ries, the creator of the Lean Startup Methodology on “Lean Startup > Secrets Revealed.” This video shows you how to validate your ideas, > optimize your ideas and identify your business strategy. > [http://p.sf.net/sfu/appsumosfdev2dev](http://p.sf.net/sfu/appsumosfdev2dev) > > * * * > > Avogadro-Discuss mailing list > [Avogadro-Discuss@lists.sourceforge.net](mailto:Avogadro-Discuss@lists.sourceforge.net) > [avogadro-discuss List Signup and Options](https://lists.sourceforge.net/lists/listinfo/avogadro-discuss)