Add -wnet to SP invocations

This causes a warning when accidentally backpatching an XML-style
empty-element tag like <xref linkend="abc"/>.

diff --git a/doc/src/sgml/Makefile b/doc/src/sgml/Makefile
index 5baf04cf1014af692d13733e48c813ac64b053aa..a2d6405e6b306711cc8ddc1eb10e59b4f8db3c8f 100644 (file)
--- a/doc/src/sgml/Makefile
+++ b/doc/src/sgml/Makefile
@@ -66,10 +66,11 @@ ALLSGML := $(wildcard $(srcdir)/*.sgml $(srcdir)/ref/*.sgml) $(GENERATED_SGML)
 # Enable some extra warnings
 # -wfully-tagged needed to throw a warning on missing tags
 # for older tool chains, 2007-08-31
+# -wnet catches XML-style empty-element tags like <xref linkend="abc"/>.
 # Note: try "make SPFLAGS=-wxml" to catch a lot of other dubious constructs,
 # in particular < and & that haven't been made into entities.  It's far too
 # noisy to turn on by default, unfortunately.
-override SPFLAGS += -wall -wno-unused-param -wno-empty -wfully-tagged
+override SPFLAGS += -wall -wno-unused-param -wno-empty -wfully-tagged -wnet
 
 
 ##