Minor cleanups for SDK devsite docs.

native_client_sdk/src/doc/Makefile

Index: native_client_sdk/src/doc/Makefile
diff --git a/native_client_sdk/src/doc/Makefile b/native_client_sdk/src/doc/Makefile
index 435b72ccfa40d9404e44f2129384fad4a2895c52..024730dd2946625a2ba33618d7155bc460afeec6 100644
--- a/native_client_sdk/src/doc/Makefile
+++ b/native_client_sdk/src/doc/Makefile
@@ -2,7 +2,7 @@
 #
 
 # You can set these variables from the command line.
-SPHINXOPTS    =
+SPHINXOPTS    = -W
 SPHINXBUILD   = sphinx-build
 PAPER         =
 BUILDDIR      = _build
@@ -19,7 +19,9 @@ ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 # the i18n builder cannot share the environment and doctrees with the others
 I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
 
-.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext all
+
+all: devsite
 
 help:
 	@echo "Please use \`make <target>' where <target> is one of"