# Raspberry PI 2 build failure **URL:** \ **Category:** GNU Radio\ **Created:** [June 28, 2015, 7:03pm UTC](https://www.ruby-forum.com/t/raspberry-pi-2-build-failure/242503 "2015-06-28T19:03:09Z")\ **Posts on this page:** 3\ **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 28, 2015, 7:03pm UTC](https://www.ruby-forum.com/t/raspberry-pi-2-build-failure/242503/1 "2015-06-28T19:03:09Z")
Hello, I have been attempting to build gnu radio on a Raspberry PI 2 running Debian Wheezy. I believe I have properly built and installed the latest releases of the gnu radio dependencies. However the gnu radio build fails with the following: ron@squireoaksfarm-radio ~/src/gnuradio/build $ make -j4 [0%] Built target doxygen\_target [0%] Built target pygen\_python\_volk\_modtool\_e4ffc [1%] Built target pygen\_python\_volk\_modtool\_2f770 [1%] Built target pmt\_generated [1%] Built target gr\_fec\_rstest [4%] Built target blocks\_generated\_includes [4%] Built target filter\_generated\_includes [5%] Built target pygen\_gr\_filter\_examples\_d9ea4 [5%] Built target digital\_generated\_includes [5%] Built target analog\_generated\_includes [7%] Built target volk\_obj [7%] Built target atsc\_viterbi\_gen [7%] Built target atsci\_viterbi\_gen [7%] Built target gr\_trellis\_xml [7%] Built target generate\_codebook [8%] Built target trellis\_generated\_includes [8%] Built target volk [9%] Built target gnuradio-pmt [9%] Linking CXX executable test\_all [10%] Linking CXX executable volk\_profile [10%] Linking CXX executable volk-config-info [16%] Built target gnuradio-runtime libvolk.so.1.0: undefined reference to `volk_16i_max_star_horizontal_16i_neonasm' libvolk.so.1.0: undefined reference to`volk\_32fc\_x2\_multiply\_32fc\_neonasm’ libvolk.so.1.0: undefined reference to `volk_32fc_32f_dot_prod_32fc_a_neonasm' libvolk.so.1.0: undefined reference to`volk\_32f\_x2\_dot\_prod\_32f\_neonasm’ libvolk.so.1.0: undefined reference to `volk_32f_x2_dot_prod_32f_neonasm_opts' libvolk.so.1.0: undefined reference to`volk\_32fc\_32f\_dot\_prod\_32fc\_a\_neonpipeline’ collect2: ld returned 1 exit status volk/lib/CMakeFiles/test\_all.dir/build.make:121: recipe for target ‘volk/lib/test\_all’ failed make[2]: \*\*\* [volk/lib/test\_all] Error 1 CMakeFiles/Makefile2:178: recipe for target ‘volk/lib/CMakeFiles/test\_all.dir/all’ failed make[1]: \*\*\* [volk/lib/CMakeFiles/test\_all.dir/all] Error 2 make[1]: \*\*\* Waiting for unfinished jobs… …/lib/libvolk.so.1.0: undefined reference to `volk_32fc_x2_multiply_32fc_neonasm' ../lib/libvolk.so.1.0: undefined reference to`volk\_16i\_max\_star\_horizontal\_16i\_neonasm’ …/lib/libvolk.so.1.0: undefined reference to `volk_32fc_32f_dot_prod_32fc_a_neonasm' ../lib/libvolk.so.1.0: undefined reference to`volk\_32f\_x2\_dot\_prod\_32f\_neonasm\_opts’ …/lib/libvolk.so.1.0: undefined reference to `volk_32fc_32f_dot_prod_32fc_a_neonpipeline' ../lib/libvolk.so.1.0: undefined reference to`volk\_32f\_x2\_dot\_prod\_32f\_neonasm’ collect2: ld returned 1 exit status volk/apps/CMakeFiles/volk-config-info.dir/build.make:99: recipe for target ‘volk/apps/volk-config-info’ failed make[2]: \*\*\* [volk/apps/volk-config-info] Error 1 CMakeFiles/Makefile2:309: recipe for target ‘volk/apps/CMakeFiles/volk-config-info.dir/all’ failed make[1]: \*\*\* [volk/apps/CMakeFiles/volk-config-info.dir/all] Error 2 [17%] Built target test-gnuradio-runtime …/lib/libvolk.so.1.0: undefined reference to `volk_32fc_x2_multiply_32fc_neonasm' ../lib/libvolk.so.1.0: undefined reference to`volk\_16i\_max\_star\_horizontal\_16i\_neonasm’ …/lib/libvolk.so.1.0: undefined reference to `volk_32fc_32f_dot_prod_32fc_a_neonasm' ../lib/libvolk.so.1.0: undefined reference to`volk\_32f\_x2\_dot\_prod\_32f\_neonasm\_opts’ …/lib/libvolk.so.1.0: undefined reference to `volk_32fc_32f_dot_prod_32fc_a_neonpipeline' ../lib/libvolk.so.1.0: undefined reference to`volk\_32f\_x2\_dot\_prod\_32f\_neonasm’ collect2: ld returned 1 exit status volk/apps/CMakeFiles/volk\_profile.dir/build.make:125: recipe for target ‘volk/apps/volk\_profile’ failed make[2]: \*\*\* [volk/apps/volk\_profile] Error 1 CMakeFiles/Makefile2:346: recipe for target ‘volk/apps/CMakeFiles/volk\_profile.dir/all’ failed make[1]: \*\*\* [volk/apps/CMakeFiles/volk\_profile.dir/all] Error 2 Makefile:160: recipe for target ‘all’ failed make: \*\*\* [all] Error 2 ron@squireoaksfarm-radio ~/src/gnuradio/build $ It appears there is an issue with neon support. Thanks, – 73 Ron / W4MMP ---
**Author:** ![ron](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/ecae2f/32.png) [@ron](https://www.ruby-forum.com/u/ron)\ **Post date:** [June 30, 2015, 10:03pm UTC](https://www.ruby-forum.com/t/raspberry-pi-2-build-failure/242503/2 "2015-06-30T22:03:46Z")
Hi Murat, Thanks very much for the information. I did attempt using Jessie a while ago via the raspbian repositories but that did not work out so well. I will give what you have suggested a try. 73 Ron / W4MMP ---
**Author:** ![ron](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/ecae2f/32.png) [@ron](https://www.ruby-forum.com/u/ron)\ **Post date:** [July 4, 2015, 10:37am UTC](https://www.ruby-forum.com/t/raspberry-pi-2-build-failure/242503/3 "2015-07-04T10:37:44Z")
Hi Ron, have a look at [https://gnuradio.org/redmine/projects/gnuradio/wiki/Embedded](https://gnuradio.org/redmine/projects/gnuradio/wiki/Embedded) You have to native compile: cmake -DCMAKE\_C\_FLAGS=“-march=armv7 -mthumb-interwork -mfloat-abi=hard -mfpu=neon -mtune=cortex-a7” -DCMAKE\_ASM\_FLAGS=“-march=armv7 -mthumb-interwork -mfloat-abi=hard -mfpu=neon” After them start make. Andy Am 28.06.2015 um 19:02 schrieb Ron: