portaudio: only OSS host API available since version 19.20210406-2

[Michael Panzlaff]

Hi,

I got the right mailing list by not writing to cygwin-apps.
Since my last cygwin update (which upgraded portaudio
to 19.20210406-2) the library does not function properly anymore an no 
sound playback is possible.

Usually you query portaudio for the various host APIs for and then open 
a stream. In the past Cygwin's portaudio at least supported output via 
MME. In the latest version 19.20210406-2 this doesn't work anymore. The 
only available host API that is reported is OSS, but that doesn't really 
exist on Windows I assume. My best guess is that the package isn't 
configured correctly and isn't compiled with the correct support for all 
the APIs.

I'd be very welcome to get back support for MME. My application is 
currently unsuable on Cygwin because the library doesn't work. If it's 
just a matter of correctly configuring the package, I'd be interested in 
also getting support for the other host APIs that portaudio usually 
supports on native Windows, but that's entirely optional for me :)

Now that I checked, even downgrading to an older version of portaudio 
from the Cygwin installer doesn't fix the problem. So perhaps it's not 
caused by portaudio but from something else in Cygwin. Does anybody have 
any ideas?

Best regards
Michael Panzlaff

PS: Here is a sample C code which queries the host APIs and which should 
list MME and definitely not OSS:

#include <stdio.h>

#include <portaudio.h>

int main(void) {
     printf("Pa_Initialize() = %d\n", Pa_Initialize());
     PaHostApiIndex count = Pa_GetHostApiCount();
     printf("%d host APIs available:\n", count);

     for (int i = 0; i < count; i++) {
         const PaHostApiInfo *info = Pa_GetHostApiInfo(i);
         printf("%s\n", info->name);
     }
}