Add a "null" implementation for platforms that aren't supported

src/lib.rs

@@ -51,9 +51,6 @@ If you have the possibility, you should try to match the format of the voice.
 #![feature(unsafe_destructor)]
 #![unstable]
 
-#[cfg(all(not(windows), not(unix)))]
-use this_platform_is_not_supported;
-
 pub use samples_formats::{SampleFormat, Sample};
 
 use std::ops::{Deref, DerefMut};
@@ -68,6 +65,10 @@ mod cpal_impl;
 #[path="wasapi/mod.rs"]
 mod cpal_impl;
 
+#[cfg(all(not(windows), not(unix)))]
+#[path="null/mod.rs"]
+mod cpal_impl;
+
 /// Controls a sound output. A typical application has one `Voice` for each sound
 /// it wants to output.
 ///

src/null/mod.rs

@@ -0,0 +1,39 @@
+pub struct Voice;
+pub struct Buffer<'a, T>;
+
+impl Voice {
+    pub fn new() -> Voice {
+        Voice
+    }
+
+    pub fn get_channels(&self) -> ::ChannelsCount {
+        2
+    }
+
+    pub fn get_samples_rate(&self) -> ::SamplesRate {
+        ::SamplesRate(44100)
+    }
+
+    pub fn get_samples_format(&self) -> ::SampleFormat {
+        ::SampleFormat::U16
+    }
+
+    pub fn append_data<'a, T>(&'a mut self, _: uint) -> Buffer<'a, T> {
+        Buffer
+    }
+
+    pub fn play(&mut self) {
+    }
+
+    pub fn pause(&mut self) {
+    }
+}
+
+impl<'a, T> Buffer<'a, T> {
+    pub fn get_buffer<'b>(&'b mut self) -> &'b mut [T] {
+        [].as_mut_slice()
+    }
+
+    pub fn finish(self) {
+    }
+}