[Discuss-gnuradio] undefined reference to `Pa_*

[kdag]

hi, when trying to build under debian i get til here:

Scanning dependencies of target dial_tone
[ 72%] Building CXX object
gr-audio/examples/c++/CMakeFiles/dial_tone.dir/dial_tone.cc.o
Linking CXX executable dial_tone
../../lib/libgnuradio-audio-3.7.2git.so.0.0.0: undefined reference to
`Pa_IsStreamActive'
../../lib/libgnuradio-audio-3.7.2git.so.0.0.0: undefined reference to
`Pa_GetDefaultOutputDevice'
../../lib/libgnuradio-audio-3.7.2git.so.0.0.0: undefined reference to
`Pa_GetHostApiInfo'
../../lib/libgnuradio-audio-3.7.2git.so.0.0.0: undefined reference to
`Pa_GetDefaultInputDevice'
../../lib/libgnuradio-audio-3.7.2git.so.0.0.0: undefined reference to
`Pa_GetDeviceCount'
collect2: error: ld returned 1 exit status
make[2]: *** [gr-audio/examples/c++/dial_tone] Error 1
make[1]: *** [gr-audio/examples/c++/CMakeFiles/dial_tone.dir/all] Error 2
make: *** [all] Error 2
make  20.86s user 1.83s system 94% cpu 23.913 total

Any hints as to how to fix it appreciated