From 33fc1bb4ba79ff8218e3e698c74c8358a7248ce9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mikael=20=C3=85gren?= <mikael@tillitis.se>
Date: Thu, 2 Oct 2025 11:43:56 +0200
Subject: [PATCH] tool: Print b2s errors to stderr

Useful since b2s often is used like this:

`b2s -c -m app.bin > mgmt_app_digest.h`
---
 hw/application_fpga/tools/b2s/b2s.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/application_fpga/tools/b2s/b2s.go b/hw/application_fpga/tools/b2s/b2s.go
index 083a366..2f5c3b9 100644
--- a/hw/application_fpga/tools/b2s/b2s.go
+++ b/hw/application_fpga/tools/b2s/b2s.go
@@ -45,7 +45,7 @@ func main() {
 
 	message, err := os.ReadFile(messageFile)
 	if err != nil {
-		fmt.Printf("%v\n", err)
+		fmt.Fprintf(os.Stderr, "%v\n", err)
 		os.Exit(1)
 	}