diff --git a/configure b/configure
new file mode 100755
index 0000000..0914d3d
--- /dev/null
+++ b/configure
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+OS="$(uname -s)"
+
+case "$OS" in
+	Linux)
+		EXTRAFLAGS=-lbsd
+		;;
+	*)
+		EXTRAFLAGS=""
+		;;
+esac
+
+echo "EXTRAFLAGS=${EXTRAFLAGS}" > config.mk