Fixed compilation when on_gba is disabled (#202)

Author: zesterer

.github/workflows/ci-builds.yml

@@ -13,7 +13,7 @@ jobs:
           - { toolchain: nightly }
     steps:
       - uses: actions/checkout@v2
-      
+
       - name: Install Apt Dependencies
         run: sudo apt-get update && sudo apt-get install binutils-arm-none-eabi
 
@@ -32,3 +32,10 @@ jobs:
           toolchain: ${{ matrix.rust.toolchain }}
           command: build
           args: --examples
+
+      - name: Check compilation succeeds when not on the GBA (check to prevent complaints about missing things)
+        uses: actions-rs/cargo@v1
+        with:
+          toolchain: ${{ matrix.rust.toolchain }}
+          command: check
+          args: --no-default-features

src/lib.rs

@@ -87,6 +87,7 @@
 //! break any of these assumptions, if you do that some or all of the code
 //! provided by this crate may become unsound.
 
+#[cfg(feature = "on_gba")]
 use prelude::{GbaCell, IrqFn};
 
 mod macros;
@@ -118,6 +119,7 @@ pub mod video;
 
 /// The function pointer that the assembly runtime calls when an interrupt
 /// occurs.
+#[cfg(feature = "on_gba")]
 pub static RUST_IRQ_HANDLER: GbaCell<Option<IrqFn>> = GbaCell::new(None);
 
 /// Wraps a value to be aligned to a minimum of 4.

src/video/mod.rs

@@ -326,6 +326,7 @@ impl TextEntry {
 }
 
 #[inline]
+#[cfg(feature = "on_gba")]
 pub fn video3_clear_to(c: Color) {
   let u = u32::from(c.0) << 16 | u32::from(c.0);
   unsafe {
@@ -350,6 +351,7 @@ impl Video3Bitmap {
 }
 
 #[inline]
+#[cfg(feature = "on_gba")]
 pub fn video3_set_bitmap(bitmap: &Video3Bitmap) {
   let p = VIDEO3_VRAM.as_usize() as *mut _;
   unsafe {
@@ -365,6 +367,7 @@ pub struct Video4Indexmap(pub [u8; 240 * 160]);
 /// ## Panics
 /// Only frames 0 and 1 exist, if `frame` is 2 or more this will panic.
 #[inline]
+#[cfg(feature = "on_gba")]
 pub fn video4_set_indexmap(indexes: &Video4Indexmap, frame: usize) {
   let p = VIDEO4_VRAM.get_frame(usize::from(frame)).unwrap().as_usize()
     as *mut [u32; 8];