[PATCH 1/2] doc/Makefile: turn warnings into errors

[Heinrich Schuchardt]

Several patches delivered incorrect restructured text as documentation. We
should be able to discover this in Travis CI or Gitlab CI.

So let us turn all build warnings into errors.

We cannot add --keep-going as Gitlab does not use sphinx-build version 1.8
or later yet.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 doc/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/Makefile b/doc/Makefile
index 5135a96e88..0e0da5666f 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -56,6 +56,7 @@ quiet_cmd_sphinx = SPHINX  $@ --> file://$(abspath $(BUILDDIR)/$3/$4)
 	PYTHONDONTWRITEBYTECODE=1 \
 	BUILDDIR=$(abspath $(BUILDDIR)) SPHINX_CONF=$(abspath $(srctree)/$(src)/$5/$(SPHINX_CONF)) \
 	$(SPHINXBUILD) \
+	-W \
 	-b $2 \
 	-c $(abspath $(srctree)/$(src)) \
 	-d $(abspath $(BUILDDIR)/.doctrees/$3) \
--
2.25.0