From 3b1199fbdcddd878265f34dfe673fd52f1711bc0 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Sat, 21 Jan 2017 13:00:20 -0500
Subject: [PATCH] Error out of configure script if submodules have not been
 checked out

---
 configure | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/configure b/configure
index a9d33b7..bafe681 100755
--- a/configure
+++ b/configure
@@ -1,2 +1,8 @@
 #!/bin/sh
+if [ ! -e libs/glcxx/src ]; then
+  echo Warning: It appears that you have not checked out the submodules.
+  echo Please run \'git submodule update --init\' first.
+  exit 1
+fi
+
 exec ./waf configure "$@"