on Linux use tsort and reverse with tac, On BSD use tsort -r

1 files changed, 17 insertions, 0 deletions

diff --git a/scripts/tsort b/scripts/tsort
new file mode 100755
index 000000000..45bd2bc24
--- /dev/null
+++ b/scripts/tsort
@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+# This file is part of the OpenADK project. OpenADK is copyrighted
+# material, please see the LICENCE file in the top-level directory.
+
+os=$(uname)
+case $os in
+	NetBSD|MirBSD|OpenBSD)
+		targ="-r"
+		;;
+	*)
+		targ="|tac"
+		;;
+esac
+if [ -x /usr/bin/tsort ];then
+        /usr/bin/tsort $targ "$@"
+fi
+