eSpeak uses version V18 of the portaudio library, which is the version used by OpenOffice.org and the Audacity sound editor. I haven't tried it with V19. I can't find a Debian package for V19, and when I downloaded the source from portaudio.com it wouldn't compile (or at least, it wouldn't install). I use MEPIS 3.4.3 which is a Debian based distribution. There is an incompatibility between the two versions of portaudio. eSpeak uses a function Pa_StreamActive() but in V19 the equivalent function is renamed Pa_IsStreamActive(). So two versions of eSpeak will be needed for the different portaudio versions. It may be that simply changing the two uses of Pa_StreamActive() in the wavegen.cpp file to Pa_IsStreamActive() and changing the line in portaudio.h PaError Pa_StreamActive( PortAudioStream *stream ); to PaError Pa_StreamActive( PortAudioStream *stream ); will fix the problem, but I don't know. Perhaps someone who has installed portaudio V19 can try it. If you don't want to use the portaudio interface, but just use eSpeak to produce WAV file outputs to be played by another program, then you could compile eSpeak after commenting-out the line #define USE_PORTAUDIO in speech.h
