Warnings are errors

markgoddard · markgoddard · commit 80178bae657c · 2023-03-01T16:56:12.000Z
diff --git a/Makefile b/Makefile
@@ -3,7 +3,7 @@
 
 # You can set these variables from the command line, and also
 # from the environment for the first two.
-SPHINXOPTS    ?=
+SPHINXOPTS    ?= -W
 SPHINXBUILD   ?= sphinx-build
 SOURCEDIR     = source
 BUILDDIR      = build
