From e1c5d1378bcbd0235651786bfd548d388f332013 Mon Sep 17 00:00:00 2001
From: Todd Gamblin <tgamblin@llnl.gov>
Date: Tue, 21 May 2019 22:39:33 -0700
Subject: [PATCH] docs: match ReadTheDocs; use -W (warnings as errors) with
 Sphinx

---
 lib/spack/docs/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/spack/docs/Makefile b/lib/spack/docs/Makefile
index 1ce5c1910c..1a8c13e8fb 100644
--- a/lib/spack/docs/Makefile
+++ b/lib/spack/docs/Makefile
@@ -2,7 +2,7 @@
 #
 
 # You can set these variables from the command line.
-SPHINXOPTS    = -E
+SPHINXOPTS    = -W
 SPHINXBUILD   = sphinx-build
 PAPER         =
 BUILDDIR      = _build