Merge #394

394: Detect if the rt flag is defined in the PAC/HAL r=AfoHT a=korken89

This stops RTIC applications from compiling if one has forgotten to set the `rt` flag in the PAC/HAL.

The error:

```
error[E0433]: failed to resolve: could not find `interrupt` in `you_must_enable_the_rt_feature_for_the_pac_in_your_cargo_toml`
 --> src/main.rs:8:1
  |
8 | #[rtic::app(device = stm32l4xx_hal::pac)]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ could not find `interrupt` in `you_must_enable_the_rt_feature_for_the_pac_in_your_cargo_toml`
  |
  = note: this error originates in an attribute macro (in Nightly builds, run with -Z macro-backtrace for more info)
```

Co-authored-by: Emil Fresk <emil.fresk@gmail.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/macros/src/codegen/spawn_body.rs b/macros/src/codegen/spawn_body.rs
index 4ecd0757..f29393a6 100644
--- a/macros/src/codegen/spawn_body.rs
+++ b/macros/src/codegen/spawn_body.rs
@@ -10,7 +10,7 @@ pub fn codegen(
     name: &Ident,
     app: &App,
     analysis: &Analysis,
-    extra: &Extra,
+    _extra: &Extra,
 ) -> TokenStream2 {
     let spawnee = &app.software_tasks[name];
     let priority = spawnee.args.priority;
@@ -42,12 +42,11 @@ pub fn codegen(
         )
     };
 
-    let device = extra.device;
     let enum_ = util::interrupt_ident();
     let interrupt = &analysis.interrupts.get(&priority);
     let pend = {
         quote!(
-            rtic::pend(#device::#enum_::#interrupt);
+            rtic::pend(you_must_enable_the_rt_feature_for_the_pac_in_your_cargo_toml::#enum_::#interrupt);
         )
     };