# Problems installing gr-foo and gr-ieee802-11 **URL:** \ **Category:** GNU Radio\ **Created:** [June 22, 2015, 10:38am UTC](https://www.ruby-forum.com/t/problems-installing-gr-foo-and-gr-ieee802-11/242400 "2015-06-22T10:38:40Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Post date:** [June 22, 2015, 10:38am UTC](https://www.ruby-forum.com/t/problems-installing-gr-foo-and-gr-ieee802-11/242400/1 "2015-06-22T10:38:40Z")
Hello, I was trying to run some flow graphs from gr-ieee802-11 examples. When I opened them at the first time , there were some missing blocks like WIFI Phy Hier and foo\_packet\_pad. I got the first one fixed. For the second one I read that we need to install gr-foo to make it work. I followed these steps: git clone [GitHub - bastibl/gr-foo: Some GNU Radio blocks that I use.](https://github.com/bastibl/gr-foo.git) cd gr-foo mkdir build cd build cmake … make sudo make install sudo ldconfig but when I run the command make, this error pops up: /home/comlab/pybombs/src/gr-foo/lib/wireshark\_connector\_impl.cc: In member function ‘virtual int gr::foo::wireshark\_connector\_impl::general\_work(int, gr\_vector\_int&, gr\_vector\_const\_void\_star&, gr\_vector\_void\_star&)’: /home/comlab/pybombs/src/gr-foo/lib/wireshark\_connector\_impl.cc:165:57: error: no matching function for call to ‘gr::foo::wireshark\_connector\_impl::delete\_head\_blocking(pmt::pmt\_t, int)’ pmt::pmt\_t msg(delete\_head\_blocking(pmt::mp(“in”), 100)); ^ /home/comlab/pybombs/src/gr-foo/lib/wireshark\_connector\_impl.cc:165:57: note: candidate is: In file included from /usr/local/target/include/gnuradio/block.h:27:0, from /home/comlab/pybombs/src/gr-foo/include/foo/wireshark\_connector.h:21, from /home/comlab/pybombs/src/gr-foo/lib/wireshark\_connector\_impl.h:20, from /home/comlab/pybombs/src/gr-foo/lib/wireshark\_connector\_impl.cc:17: /usr/local/target/include/gnuradio/basic\_block.h:259:16: note: pmt::pmt\_t gr::basic\_block::delete\_head\_blocking(pmt::pmt\_t) pmt::pmt\_t delete\_head\_blocking( pmt::pmt\_t which\_port); ^ /usr/local/target/include/gnuradio/basic\_block.h:259:16: note: candidate expects 1 argument, 2 provided make[2]: \*\*\* [lib/CMakeFiles/gnuradio-foo.dir/wireshark\_connector\_impl.cc.o] Error 1 make[1]: \*\*\* [lib/CMakeFiles/gnuradio-foo.dir/all] Error 2 make: \*\*\* [all] Error 2 Could anyone tell me why is this happening? ---
**Author:** ![gabri187](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/e9bcb4/32.png) [@gabri187](https://www.ruby-forum.com/u/gabri187)\ **Post date:** [June 29, 2015, 1:24pm UTC](https://www.ruby-forum.com/t/problems-installing-gr-foo-and-gr-ieee802-11/242400/2 "2015-06-29T13:24:53Z")
I faced the same problem. However, I was able to get it working by switching to the previous revision. I recommend to start from scratch as I had compilation errors when I changed the revision during the compilation of the latest revision. After cloning the repo, just enter the following command: git reset --hard 00beec517d096e4f2f6a45250750369db90dc104 Afterwards, carry on as usual. Cheers ---
**Author:** ![gabri187](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/e9bcb4/32.png) [@gabri187](https://www.ruby-forum.com/u/gabri187)\ **Post date:** [June 30, 2015, 3:02pm UTC](https://www.ruby-forum.com/t/problems-installing-gr-foo-and-gr-ieee802-11/242400/3 "2015-06-30T15:02:32Z")
Hello, thanks for your help. I tried the command but again it is not working I guess that parameter after --hard is different for each individual case, because this message appears now. fatal: Could not parse object ‘00beec517d096e4f2f6a45250750369db90dc104’. Thanks anyways for your reply. Best regards. ---
**Author:** ![gabri187](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/e9bcb4/32.png) [@gabri187](https://www.ruby-forum.com/u/gabri187)\ **Post date:** [June 30, 2015, 3:21pm UTC](https://www.ruby-forum.com/t/problems-installing-gr-foo-and-gr-ieee802-11/242400/4 "2015-06-30T15:21:29Z")
I actually introduced the command you sent to me after: cd gr-foo and it worked. Now everything is working. Thanks so much for your help. I should have tried more before posting. BR ---
**Author:** ![gabri187](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/e9bcb4/32.png) [@gabri187](https://www.ruby-forum.com/u/gabri187)\ **Post date:** [June 30, 2015, 3:02pm UTC](https://www.ruby-forum.com/t/problems-installing-gr-foo-and-gr-ieee802-11/242400/5 "2015-06-30T15:02:48Z")
The reply from Bastian B. to correspond with him about this error was as follow: you need GNU Radio 3.7.6 for this. I will adapt the CMakeLists.txt file to produce a better error message. ---
**Author:** ![gabri187](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/e9bcb4/32.png) [@gabri187](https://www.ruby-forum.com/u/gabri187)\ **Post date:** [June 30, 2015, 3:27pm UTC](https://www.ruby-forum.com/t/problems-installing-gr-foo-and-gr-ieee802-11/242400/6 "2015-06-30T15:27:02Z")
On 06/30/2015 03:02 PM, Alta Alta wrote: > The reply from Bastian B. to correspond with him about this error > was as follow: > > you need GNU Radio 3.7.6 for this. I will adapt the CMakeLists.txt file > to produce a better error message. I did that yesterday: > Recently, Sylvain added a timeout parameter to delete\_head\_blocking of basic\_block. This avoids busy-wating for new messages. One block uses this timeout parameters. Thus, you need 3.7.6. > > > Signed-off-by: Sylvain Munaut \ I guess with some cmake magic and preprocessor directives it’s possible to compile this also with older GNU Radio versions. Best, Bastian