Switch to thumbv7em-none-eabi

Ferrocene supports that already.

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  CORE_TARGET: thumbv7m-none-eabi # needed by `core`
+  CORE_TARGET: thumbv7em-none-eabi # needed by `core`
 
 jobs:
   test:

test-flip-link-app/.cargo/config.toml

@@ -1,9 +1,9 @@
-[target.thumbv7m-none-eabi]
+[target.thumbv7em-none-eabi]
 runner = "qemu-system-arm -cpu cortex-m3 -machine lm3s6965evb -nographic -semihosting-config enable=on,target=native -kernel"
 rustflags = [
   "-C", "linker=flip-link",
   "-C", "link-arg=-Tlink.x",
 ]
 
 [build]
-target = "thumbv7m-none-eabi"
+target = "thumbv7em-none-eabi"

tests/verify.rs

@@ -7,7 +7,7 @@ const CRATE: &str = "test-flip-link-app";
 /// Example firmware in `$CRATE/examples`
 const FILES: [&str; 4] = ["crash", "exception", "hello", "panic"];
 /// Compilation target firmware is build for
-const TARGET: &str = "thumbv7m-none-eabi";
+const TARGET: &str = "thumbv7em-none-eabi";
 
 type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
 

xtest/src/main.rs

@@ -59,7 +59,7 @@ mod cargo {
 mod rustup {
     use super::*;
 
-    const TARGET: &str = "thumbv7m-none-eabi";
+    const TARGET: &str = "thumbv7em-none-eabi";
 
     pub fn install_target() -> Result<()> {
         let status = Command::new("rustup")