Add build.rs to detect armv6

1 files changed, 11 insertions, 0 deletions

diff --git a/embassy-boot/stm32/build.rs b/embassy-boot/stm32/build.rs
new file mode 100644
index 000000000..03d0119fc
--- /dev/null
+++ b/embassy-boot/stm32/build.rs
@@ -0,0 +1,11 @@
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    let target = env::var("TARGET").unwrap();
+    if target.starts_with("thumbv6m-") {
+        println!("cargo:rustc-cfg=armv6m");
+    }
+}