I cannot build libconvolve though because it depends
on libdsp which is
not available for Debian any more (AFAIK) and the source tarball seems to
depend on NPTL headers (which do not seem to exist on my machine):
DynThreads.cc:28:26: nptl/pthread.h: No such file or directory
The problem was with the line:
ifndef USE_NPTL
which was not defined, but for some reason my machine was ignoring
(perhaps some gcc related problem??), leading it to look for
/usr/include/nptl/pthread.h instead of /usr/include/pthread.h
Fixed it with a little hand-editing!
James