From a1d7b58e6e20dc50e2ea4fc7be6aa0dc3e415d27 Mon Sep 17 00:00:00 2001
From: Juergen Spitzmueller <spitz@lyx.org>
Date: Sun, 19 Feb 2017 12:25:23 +0100
Subject: [PATCH] Compatibility fix for acmsiggraph.cls v0.93
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Reported by Jean-Pierre Chrétien, fix suggested by Günter Milde.

Also add a note about obsolescence of the class, by Jean-Pierre.
---
 lib/layouts/acmsiggraph-0-92.layout | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/layouts/acmsiggraph-0-92.layout b/lib/layouts/acmsiggraph-0-92.layout
index f9fd34230f..deb0503278 100644
--- a/lib/layouts/acmsiggraph-0-92.layout
+++ b/lib/layouts/acmsiggraph-0-92.layout
@@ -8,6 +8,11 @@
 # BibTeX style and template, and the documentation is available at
 # http://www.siggraph.org/learn/instructions-authors
 #
+# NOTE: As from Spring 2017, the class will not be usable to submit
+# a publication to ACM, it is OBSOLETE.
+# Please use instead the new acmart.cls class file, distributed with
+# TeXLive >= 2016
+#
 # Versions:
 #  siggraph 0.9:  initial layout
 #  siggraph 0.92: Removed styles "TOG project URL", "TOG video URL", 
@@ -110,6 +115,10 @@ Style "Copyright_year"
 	CopyStyle		"TOG online ID"
 	LatexName		copyrightyear
 	LabelString		"Year of copyright:"
+	Preamble
+	% Compatibility fix for acmsiggraph >= 0.93.
+	\@ifundefined{copyrightyear}{\let\copyrightyear\CopyrightYear}{}
+	EndPreamble
 End