From 60c820245de2bfc5c43e6b2e85f7985ea7881a2f Mon Sep 17 00:00:00 2001
From: Evan Miller <emmiller@gmail.com>
Date: Tue, 18 Aug 2020 09:05:33 -0400
Subject: [PATCH] Only set -Wno-yacc if $YACC supports it

---
 configure.ac | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index d0b228f..2f22ece 100644
--- a/configure.ac
+++ b/configure.ac
@@ -53,7 +53,9 @@ if $YACC -V >/dev/null 2>&1; then
     if $YACC -Wno-conflicts-sr -V >/dev/null 2>&1; then
         YFLAGS="$YFLAGS -Wno-conflicts-sr"
     fi
-    YFLAGS="$YFLAGS -Wno-yacc"
+    if $YACC -Wno-yacc -V >/dev/null 2>&1; then
+        YFLAGS="$YFLAGS -Wno-yacc"
+    fi
 else
 sql=false
 fi