From d8d1ce57487886490f7b517ac0f38aa1f7f19911 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Fri, 10 May 2013 11:53:52 -0400
Subject: Makefile.in: Add note re: inference rules & POSIX.

---
diff --git a/Makefile.in b/Makefile.in
index 552d60c..ba96168 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -94,6 +94,13 @@ script = \
 .SUFFIXES:
 .SUFFIXES: .sh .sm .1in .1 .ms
 
+# XXX: Support for lists of multiple targets in inference rules doesn't appear
+# to be required by POSIX.1-2008 [1], but it exists in GNU Make and NetBSD
+# pmake.  Expand this into separate rules if it is a problem with certain make
+# implementations.
+# [1]: Compare the inference and target rule definitions after fragments
+#      <#tag_20_76_13_06> and <#tag_20_76_13_04> in
+#      <http://pubs.opengroup.org/onlinepubs/9699919799/utilities/make.html>.
 .sh .sh.sm .1in.1:
 	@printf '  SED %s\n' '$@'
 	@sed '$(script)' '$(srcdir)/$?' >'$@'
--
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