From f74d5dee1615e4d5ed8763fae40ffe6102c61a2c Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Wed, 25 Mar 2015 15:33:07 +0100
Subject: Warn about buggy re2c versions

---
 Makefile | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'Makefile')

diff --git a/Makefile b/Makefile
index cedee8c..9b6b78e 100644
--- a/Makefile
+++ b/Makefile
@@ -100,6 +100,13 @@ $(SRCDIR)/case_fold_switch.inc: $(DATADIR)/CaseFolding-3.2.0.txt
 # We include scanners.c in the repository, so this shouldn't
 # normally need to be generated.
 $(SRCDIR)/scanners.c: $(SRCDIR)/scanners.re
+	@case "$$(re2c -v)" in \
+	    *\ 0.13.7*|*\ 0.14*) \
+		echo $$(re2c -v) is known to produce buggy code.; \
+		echo Try version 0.13.6 or below.; \
+		false; \
+		;; \
+	esac
 	re2c --case-insensitive -b -i --no-generation-date -o $@ $<
 
 update-spec:
-- 
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