A friend was attempting to build gnuradio on Linux Mint 17.1 32-bit. I run 64-bit Linux Mint and did not have this issue since it is specific to 32-bit builds.
If you’re attempting to build gnuradio on a 32-bit system system, whether it be Ubuntu or Mint or something else, you might not be able to build gnuradio without issues. This applies only to the latest gnuradio available as of 12/26/2014. The issue will probably be fixed in future versions.
To resolve this issue so that you can rebuild gnuradio, scroll to the bottom.
[ 22%] Built target gnuradio-pmt
[ 22%] Built target _pmt_swig_swig_tag
../lib/libvolk.so.0.0.0: undefined reference to `volk_64u_popcnt_a_sse4_2′
collect2: error: ld returned 1 exit status
make[2]: *** [volk/apps/volk-config-info] Error 1
make[1]: *** [volk/apps/CMakeFiles/volk-config-info.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs….
[ 22%] Built target _blocks_swig0_swig_tag
../lib/libvolk.so.0.0.0: undefined reference to `volk_64u_popcnt_a_sse4_2′
collect2: error: ld returned 1 exit status
make[2]: *** [volk/apps/volk_profile] Error 1
make[1]: *** [volk/apps/CMakeFiles/volk_profile.dir/all] Error 2
libvolk.so.0.0.0: undefined reference to `volk_64u_popcnt_a_sse4_2′
collect2: error: ld returned 1 exit status
make[2]: *** [volk/lib/test_all] Error 1
make[1]: *** [volk/lib/CMakeFiles/test_all.dir/all] Error 2
make: *** [all] Error 2
Build failed. See output above for error messages.
billybob@billybob-ThinkCentre-XXXX ~/pybombs $
Solution (which I found here):
A fix for this is to change line 39 in volk/kernels/volk/volk_64u_popcntpuppet_64u.h
from
#ifdef LV_HAVE_SSE4_2
to
#if LV_HAVE_SSE4_2 && LV_HAVE_64