I'm trying to add a 'clear' message method to the internal delwrite~ object.
I guess I'm not the first to try:
http://lists.puredata.info/pipermail/pd-list/2011-02/086414.html

However, I can't get the vanilla PD (44-1) to compile (even without my modification).

After running ./autogen.sh successfully, I run ./configure I get this error:
"
./configure: line 15435: syntax error near unexpected token `JACK,'
./configure: line 15435: ` PKG_CHECK_MODULES(JACK, jack, have_jack=yes, have_jack=no)'
configure: error: ./configure failed for portaudio
"

I also tried compiling my own delwrite~ ugen variation with a different name (delwritec~), but that fails because delwrite~ objects shares a lot of stuff with delread~,vd~ etc... Delread~ couldn't find the delay line created by my own variation of 'delwritecxs~', So I guess it should be easiest to just modify the source of PD.

Thanks Katja, this solved my problem, hopefully Miller will include a clear message one day so we can all do this more elegantly .