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-rw-r--r--doc/src/sgml/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/src/sgml/Makefile b/doc/src/sgml/Makefile
index 5baf04cf101..a2d6405e6b3 100644
--- 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
##