From bdb8bb35ef080ab326cf94c0b50d6600f50971be Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Tue, 1 Jun 2021 12:42:34 -0700
Subject: [PROPOSED] Check backzone syntax too
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* Makefile (check_public): Also check ‘backzone’ syntax.
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index ce018ec..77ef331 100644
--- a/Makefile
+++ b/Makefile
@@ -958,6 +958,12 @@ check_public: $(VERSION_DEPS)
 		  public.dir/zic -v -d public.dir/zoneinfo $$i 2>&1 || exit; \
 		done
 		public.dir/zic -v -d public.dir/zoneinfo-all $(TDATA_TO_CHECK)
+		:
+		: Also check 'backzone' syntax.
+		rm public.dir/main.zi
+		cd public.dir && $(MAKE) PACKRATDATA=backzone main.zi
+		public.dir/zic -d public.dir/zoneinfo main.zi
+		:
 		rm -fr public.dir
 		touch $@
 
-- 
2.27.0