detect arm version from runtime internal register

arm.go

@@ -0,0 +1,8 @@
+package main
+
+import (
+	_ "unsafe"
+)
+
+//go:linkname goarm runtime.goarm
+var goarm uint8

commands.go

@@ -152,6 +152,9 @@ func displayVersion(_ *config.Config, flags commandLineFlags, _ []string) error
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "home", "https://github.com/creativeprojects/resticprofile")
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "os", runtime.GOOS)
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "arch", runtime.GOARCH)
+		if goarm > 0 {
+			_, _ = fmt.Fprintf(w, "\t%s:\tv%d\n", "arm", goarm)
+		}
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "version", version)
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "commit", commit)
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "compiled", date)

main.go

@@ -364,6 +364,9 @@ Can you please open an issue on github including these details:
 		w := tabwriter.NewWriter(os.Stderr, 0, 0, 3, ' ', 0)
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "os", runtime.GOOS)
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "arch", runtime.GOARCH)
+		if goarm > 0 {
+			_, _ = fmt.Fprintf(w, "\t%s:\tv%d\n", "arm", goarm)
+		}
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "version", version)
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "commit", commit)
 		_, _ = fmt.Fprintf(w, "\t%s:\t%s\n", "compiled", date)