From 7ffc0a6534fb66ad27d22984e25bd0789f4404b6 Mon Sep 17 00:00:00 2001
From: Jan Maria Matejka <mq@ucw.cz>
Date: Tue, 14 Aug 2018 14:36:44 +0200
Subject: Bison: A bit more verbose error messages in config.

---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 9a2e55e2..943d3a7b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -164,7 +164,12 @@ if test "$bird_bison_synclines" = yes; then
   M4FLAGS="$M4FLAGS -s"
 fi
 
+if test "$bird_bison_enhanced_error" = yes; then
+  BISONFLAGS="$BISONFLAGS -Dparse.lac=full -Dparse.error=verbose"
+fi
+
 AC_SUBST([M4FLAGS])
+AC_SUBST([BISONFLAGS])
 
 BIRD_CHECK_PROG_FLAVOR_GNU([$M4],
   [],
-- 
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