doc: Treat Sphinx warnings as errors
'make doc' will now fail if Sphinx outputs any warning messages during
documentation generation.
Change-Id: I3e466af58ccf29b14a7e61037539b79ab6fc6037
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
diff --git a/docs/Makefile b/docs/Makefile
index eed3a08..3dd7ebc 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -1,5 +1,5 @@
#
-# Copyright (c) 2019, ARM Limited. All rights reserved.
+# Copyright (c) 2019-2020, ARM Limited. All rights reserved.
#
# SPDX-License-Identifier: BSD-3-Clause
#
@@ -7,7 +7,7 @@
#
# You can set these variables from the command line.
-SPHINXOPTS =
+SPHINXOPTS = -W
SPHINXBUILD = sphinx-build
SPHINXPROJ = TrustedFirmware-A
SOURCEDIR = .