From 7e912610405262769f537b3c7e3301c65f13f149 Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Sun, 13 Oct 2024 21:47:40 +0200
Subject: [PATCH] rp/multicore: enable fpu on second core only if building for
 -eabihf targets.

---
 embassy-rp/build.rs         | 5 +++++
 embassy-rp/src/multicore.rs | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/embassy-rp/build.rs b/embassy-rp/build.rs
index 3216a38267..18860ffb58 100644
--- a/embassy-rp/build.rs
+++ b/embassy-rp/build.rs
@@ -15,5 +15,10 @@ fn main() {
 
         println!("cargo:rerun-if-changed=build.rs");
         println!("cargo:rerun-if-changed=link-rp.x.in");
+
+        println!("cargo:rustc-check-cfg=cfg(has_fpu)");
+        if target.ends_with("-eabihf") {
+            println!("cargo:rustc-cfg=has_fpu");
+        }
     }
 }
diff --git a/embassy-rp/src/multicore.rs b/embassy-rp/src/multicore.rs
index 7e2e776ea8..81de849071 100644
--- a/embassy-rp/src/multicore.rs
+++ b/embassy-rp/src/multicore.rs
@@ -170,7 +170,7 @@ where
         };
 
         // Enable FPU
-        #[cfg(feature = "_rp235x")]
+        #[cfg(all(feature = "_rp235x", has_fpu))]
         unsafe {
             let p = cortex_m::Peripherals::steal();
             p.SCB.cpacr.modify(|cpacr| cpacr | (3 << 20) | (3 << 22));