Add build rule for build-octave (bug #49503). * src/build-octave.mk: Add new build rule for build-octave which can be used for cross-building binary packages that depend on Octave as a build tool. * dist-files.mk: Add new file to list. * index.html: Add new package to list. * src/of-communications.mk, src/of-image.mk, src/of-mapping.mk, src/of-optiminterp.mk, src/of-sparsersb.mk, src/of-statistics.mk, src/of-windows.mk: Add optional dependency on build-octave. * configure.ac: Add new configure switch "--disable-system-octave" that is needed to build the build-octave package. * Makefile.in: Add variable "USE_SYSTEM_OCTAVE". Exclude build-octave from the default build tools and build it only if a package explicitly depends on it. Display warning about missing native Octave version only if necessary.

/*
 * This file is part of MXE.
 * See index.html for further information.
 */

#include <portaudio.h>
#include <stdio.h>

int main()
{
    int i;
    const PaDeviceInfo *device_info;

    Pa_Initialize();
    printf("Version: %s\n", Pa_GetVersionText());
    for( i = 0; i < Pa_GetDeviceCount(); i++ )
    {
        device_info = Pa_GetDeviceInfo(i);
        printf("Device %d: %s %s\n", i, device_info->name, Pa_GetHostApiInfo(device_info->hostApi)->name);
    }
    Pa_Terminate();
    return 0;
}