Improve CI and cfg

Author: diondokter

.github/workflows/ci.yml

@@ -27,8 +27,8 @@ jobs:
         cargo install cargo-binutils
         rustup component add llvm-tools-preview
     - name: Check
-      run: cargo check --target thumbv7em-none-eabi
+      run: cargo check --features cortex-m --target thumbv7em-none-eabi
     - name: Clippy
-      run: cargo clippy --target thumbv7em-none-eabi
+      run: cargo clippy --features cortex-m --target thumbv7em-none-eabi
     - name: Format
       run: cargo fmt

src/lib.rs

@@ -12,7 +12,10 @@
 #![no_main]
 #![macro_use]
 
-#[cfg(not(any(feature = "cortex-m", feature = "risc-v", feature = "panic-handler")))]
+#[cfg(all(
+    not(any(feature = "cortex-m", feature = "risc-v")),
+    all(not(test), feature = "panic-handler")
+))]
 compile_error!("Enable either the cortex-m or risc-v feature");
 
 #[cfg(all(not(test), feature = "panic-handler"))]