build: Make --disable-xml-docs build work again

We can't build the .html files without xmlto, so don't add them
to a dist_ variable.

https://bugs.freedesktop.org/show_bug.cgi?id=55426

diff --git a/doc/Makefile.am b/doc/Makefile.am
index b265987..db81b5c 100644 (file)
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -59,9 +59,6 @@ STATIC_HTML = \
 
 dist_html_DATA += $(STATIC_HTML)
 
-# we distribute these in the tarball so users don't necessarily need xmlto
-dist_html_DATA += $(XMLTO_OUTPUT)
-
 XMLTO_OUTPUT=                                  \
        dbus-faq.html                           \
        dbus-specification.html                 \
@@ -69,6 +66,10 @@ XMLTO_OUTPUT=                                        \
        dbus-tutorial.html
 
 if DBUS_XML_DOCS_ENABLED
+
+# we distribute these in the tarball so users don't necessarily need xmlto
+dist_html_DATA += $(XMLTO_OUTPUT)
+
 dbus-specification.html: dbus-specification.xml
        $(XMLTO) html-nochunks $<