From 55b855226d79f1618ed9a09fd1c40f9178358b6c Mon Sep 17 00:00:00 2001
From: MyselfAndJo <145660743+MyselfAndJo@users.noreply.github.com>
Date: Thu, 21 Sep 2023 11:57:39 +0200
Subject: [PATCH] Change FPU flags to use single precision FPU (#13)

The Cortex-M33F has a single precision fpu, thus the linker fpu settings need to be set to -mfpu=fpv-sp-d16. Otherwise all calls to the floating point abi will lead to a crash.
---
 builder/frameworks/arduino.py | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/builder/frameworks/arduino.py b/builder/frameworks/arduino.py
index 8609725..9248196 100644
--- a/builder/frameworks/arduino.py
+++ b/builder/frameworks/arduino.py
@@ -142,14 +142,10 @@ def load_flags(filename):
 # Add FPU flags
 #
 
-fpv_version = "4-sp"
-if board.id == "portenta_c33":
-    fpv_version = "5"
-
 env.Append(
     LINKFLAGS=[
         "-mfloat-abi=hard",
-        "-mfpu=fpv%s-d16" % fpv_version
+        "-mfpu=fpv%s-sp-d16" % ("5" if board.id == "portenta_c33" else "4"),
     ]
 )