Add comment noting use of GNU make extension.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@4278 221aa14e-8319-0410-a670-987f0aec2ac5

diff --git a/gr-trellis/doc/Makefile.am b/gr-trellis/doc/Makefile.am
index 5ac7487b18b5655f8fac7f9cb725ca1b7804594b..258ee219a35f0c41e1d46b808b43d41809100977 100644 (file)
--- a/gr-trellis/doc/Makefile.am
+++ b/gr-trellis/doc/Makefile.am
@@ -47,6 +47,7 @@ BUILT_XML_FILES =
 gr-trellis.html : gr-trellis.xml
        xmlto html-nochunks $(top_srcdir)/gr-trellis/doc/gr-trellis.xml
 
+# XXX `%'-style pattern rules are a GNU make extension
 %.xml : % make_numbered_listing.py
        ./make_numbered_listing.py $<