[Discuss-gnuradio] Errors in build gnuradio-3.1.2

[Su Jinzhao]

Type 'cd' into the gnuradio directory, after ./configure command on Ubuntu 8.04, The following components were not built successfully :
gr-audio-jack/gr-audio-portaudio/gr-comedi/gr-wxgui/gr-utils

The prompt message is like this:
checking for JACK... no
gr-audio-jack requires package jack, not found.
configure: error: Component gr-audio-jack has errors; stopping.

I know the reason is that the compiler can't find the unpassed components, but I want to know where can I find or download them?

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Su Jinzhao