sokol: fix errors for audio unsupported on OpenBSD (fix #26299) (#26305)

Author: lcheylus

examples/breakout/breakout.v

@@ -1,3 +1,4 @@
+// vtest build: !openbsd
 import gg
 import math
 import rand

examples/sokol/sounds/melody.v

@@ -1,3 +1,4 @@
+// vtest build: !openbsd
 import gg
 import sokol.audio
 

examples/sokol/sounds/ogg_player.v

@@ -1,3 +1,4 @@
+// vtest build: !openbsd
 import os
 import time
 import sokol.audio

examples/sokol/sounds/simple_bytebeat.v

@@ -1,3 +1,5 @@
+// vtest build: !openbsd
+
 // This program illustrates how to use sokol.audio in a simple console app, *without a gui*.
 // See melody.v for an example of how it can be integrated into a graphics app.
 import time

examples/sokol/sounds/simple_keyboard_synth.v

@@ -1,3 +1,4 @@
+// vtest build: !openbsd
 import time
 import math
 import term

examples/sokol/sounds/simple_sin_tone_using_audio_push.v

@@ -1,4 +1,4 @@
-// vtest build: !sanitize-memory-clang // Fails compilation with: `ld: /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line`
+// vtest build: !openbsd && !sanitize-memory-clang // Fails compilation with: `ld: /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line`
 // import log
 import math
 import time

examples/sokol/sounds/simple_sin_tones.v

@@ -1,4 +1,4 @@
-// vtest build: !sanitize-memory-clang // Fails compilation with: `ld: /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line`
+// vtest build: !openbsd && !sanitize-memory-clang // Fails compilation with: `ld: /lib/x86_64-linux-gnu/libpthread.so.0: error adding symbols: DSO missing from command line`
 import time
 import math
 import sokol.audio

examples/sokol/sounds/wav_player.v

@@ -1,3 +1,4 @@
+// vtest build: !openbsd
 import os
 import time
 import sokol.audio

vlib/sokol/audio/audio.c.v

@@ -7,6 +7,10 @@ $if linux {
 	#include <alsa/asoundlib.h> # Please install the `libasound2-dev` package
 }
 
+$if openbsd {
+	$compile_error('sokol/audio not supported on OpenBSD')
+}
+
 #flag -I @VEXEROOT/thirdparty/sokol
 // FreeBSD requires the audio/alsa-lib to be installed
 #flag freebsd -I/usr/local/include