--- xglk/xg_internal.h~	2007-12-11 00:23:37.000000000 +0000
+++ xglk/xg_internal.h	2007-12-11 00:37:12.000000000 +0000
@@ -4,7 +4,7 @@
 #include <stdio.h>
 #include <X11/X.h>
 
-#ifdef GLK_MODULE_SOUND
+#if defined(GLK_MODULE_SOUND) && !defined(NO_SDL_AVAILABLE)
 #include <SDL.h>
 #include <SDL_mixer.h>
 #endif
@@ -19,7 +19,9 @@
 typedef struct glk_window_struct window_t;
 typedef struct glk_stream_struct stream_t;
 typedef struct glk_fileref_struct fileref_t;
+#ifndef NO_SDL_AVAILABLE
 typedef struct glk_schannel_struct channel_t;
+#endif
 typedef struct stylehints_struct stylehints_t;
 
 extern int gli_special_typable_table[keycode_MAXVAL+1];
@@ -139,6 +141,7 @@
 
 extern int init_gli_filerefs(void);
 
+#ifndef NO_SDL_AVAILABLE
 /* --- Sound channels --- */
 
 struct glk_schannel_struct {
@@ -168,6 +171,7 @@
 extern int init_gli_schannels(void);
 extern void exit_gli_schannels(void);
 extern Bool gli_eventloop_schannels(void);
+#endif
 
 /* --- Styles --- */
 
--- xglk/xg_gestalt.c~	2007-12-11 00:23:37.000000000 +0000
+++ xglk/xg_gestalt.c	2007-12-11 00:36:43.000000000 +0000
@@ -91,7 +91,11 @@
   case gestalt_SoundVolume:
   case gestalt_SoundNotify: 
   case gestalt_SoundMusic:
+#ifndef NO_SDL_AVAILABLE
     return TRUE;
+#else
+    return FALSE;
+#endif
 
   case gestalt_Hyperlinks: {
     return TRUE;
--- xglk/xg_misc.c~	2007-12-11 00:23:37.000000000 +0000
+++ xglk/xg_misc.c	2007-12-11 00:38:21.000000000 +0000
@@ -123,7 +123,9 @@
     (*func)();
   }
 
+#ifndef NO_SDL_AVAILABLE
   exit_gli_schannels();
+#endif
 
   exit(1);
 }
@@ -135,7 +137,9 @@
   window_t *win;
   stream_t *str;
   fileref_t *fref;
+#ifndef NO_SDL_AVAILABLE
   channel_t *chan;
+#endif
   
   gli_register_obj = reg;
   gli_unregister_obj = unreg;
@@ -158,11 +162,13 @@
 	 fref = glk_fileref_iterate(fref, NULL)) {
       fref->disprock = (*gli_register_obj)(fref, gidisp_Class_Fileref);
     }
+#ifndef NO_SDL_AVAILABLE
     for (chan = glk_schannel_iterate(NULL, NULL);
 	 chan;
 	 chan = glk_schannel_iterate(chan, NULL)) {
       chan->disprock = (*gli_register_obj)(chan, gidisp_Class_Schannel);
     }
+#endif
   }
 }
 
@@ -184,8 +190,10 @@
     return ((stream_t *)obj)->disprock;
   case gidisp_Class_Fileref:
     return ((fileref_t *)obj)->disprock;
+#ifndef NO_SDL_AVAILABLE
   case gidisp_Class_Schannel:
     return ((channel_t *)obj)->disprock;
+#endif
   default: {
       gidispatch_rock_t dummy;
       dummy.num = 0;
--- xglk/xglk.c~	2007-12-11 00:23:37.000000000 +0000
+++ xglk/xglk.c	2007-12-11 00:39:45.000000000 +0000
@@ -58,8 +58,10 @@
     return FALSE;
   if (!init_gli_filerefs())
     return FALSE;
+#ifndef NO_SDL_AVAILABLE
   if (!init_gli_schannels())
     return FALSE;
+#endif
   if (!init_gli_windows())
     return FALSE;
 
--- xglk/xglk_loop.c~	2007-12-11 00:23:37.000000000 +0000
+++ xglk/xglk_loop.c	2007-12-11 00:40:14.000000000 +0000
@@ -78,8 +78,10 @@
 
   while (ev->type == evtype_None) {
 
+#ifndef NO_SDL_AVAILABLE
     if (gli_eventloop_schannels())
       continue;
+#endif
 
     if (xio_any_invalid) {
       xglk_redraw();
--- xglk/xg_schan.c~	2007-12-11 00:23:37.000000000 +0000
+++ xglk/xg_schan.c	2007-12-11 00:41:43.000000000 +0000
@@ -13,6 +13,8 @@
 
 #ifdef GLK_MODULE_SOUND
 
+#ifndef NO_SDL_AVAILABLE
+
 #define DEBUG_MODULE_SOUND 0
 
 #include "gi_blorb.h"
@@ -401,4 +403,58 @@
   /* I doubt this will make much difference, so make it a no-op for now. */
 }
 
+#else
+
+schanid_t glk_schannel_create(glui32 rock)
+{
+  return NULL;
+}
+
+void glk_schannel_destroy(schanid_t chan)
+{
+}
+
+schanid_t glk_schannel_iterate(schanid_t chan, glui32 *rockptr)
+{
+  if (rockptr)
+    *rockptr = 0;
+  return NULL;
+}
+
+glui32 glk_schannel_get_rock(schanid_t chan)
+{
+  gli_strict_warning("schannel_get_rock: invalid id.");
+  return 0;
+}
+
+glui32 glk_schannel_play(schanid_t chan, glui32 snd)
+{
+  gli_strict_warning("schannel_play: invalid id.");
+  return 0;
+}
+
+glui32 glk_schannel_play_ext(schanid_t chan, glui32 snd, glui32 repeats,
+    glui32 notify)
+{
+  gli_strict_warning("schannel_play_ext: invalid id.");
+  return 0;
+}
+
+void glk_schannel_stop(schanid_t chan)
+{
+  gli_strict_warning("schannel_stop: invalid id.");
+}
+
+void glk_schannel_set_volume(schanid_t chan, glui32 vol)
+{
+  gli_strict_warning("schannel_set_volume: invalid id.");
+}
+
+void glk_sound_load_hint(glui32 snd, glui32 flag)
+{
+  gli_strict_warning("schannel_sound_load_hint: invalid id.");
+}
+
+#endif
+
 #endif /* GLK_MODULE_SOUND */