audio/alsa-plugins: fix build failure on DragonFly

[dragonflybot]

Generated by the DragonFly agentic build-fix loop and verified in a clean dev-env. Reviewed and accepted by operator operator before submission.

Problem

The build failed on @2026Q2 — classified compile-error, confidence high.

The DragonFly‑specific static patch patch‑oss_pcm__oss.c removes the caps field from struct snd_pcm_oss, but the oss_hw_constraint() function contains a #ifdef __FreeBSD__ block with a caps‑free implementation and an #else block that still references oss->caps. Because DragonFly does not define __FreeBSD__, the #else path is compiled against the modified struct, triggering the member‑not‑found error.

Evidence:

• From errors.txt (tail of build log):

  pcm_oss.c:574:5: error: 'snd_pcm_oss_t' {aka 'struct snd_pcm_oss'} has no member named 'caps'
    oss->caps = 0;
       ^~
  pcm_oss.c:575:45: error: 'snd_pcm_oss_t' {aka 'struct snd_pcm_oss'} has no member named 'caps'
    if (ioctl(oss->fd, SNDCTL_DSP_GETCAPS, &oss->caps) >= 0) {
                                               ^~
  pcm_oss.c:576:13: error: 'snd_pcm_oss_t' {aka 'struct snd_pcm_oss'} has no member named 'caps'
     if (! (oss->caps & DSP_CAP_TRIGGER))
               ^~
  

• The existing patch file ports/audio/alsa-plugins/dragonfly/patch‑oss_pcm__oss.c shows the struct change and the +#ifdef __FreeBSD__ guard that does not extend to __DragonFly__.

Fix

Automated fix for the build failure in audio/alsa-plugins.

What changed

3 files changed, +7/-4

• ports/audio/alsa-plugins/Makefile.DragonFly
• ports/audio/alsa-plugins/STATUS
• ports/audio/alsa-plugins/overlay.dops

Verification

Built successfully in a DragonFly dev-env (dsynth) for target @2026Q2.
Verified 2026-06-01T20:24:58.374466+00:00.

Provenance

• Operator: operator
• Agent: model=deepseek/deepseek-v4-pro attempts=1 tokens=896461