cmd/gc: make bisonerrors compatible with GNU Bison 3.0

R=golang-dev, rsc CC=golang-dev https://golang.org/cl/11990043

cmd/gc: make bisonerrors compatible with GNU Bison 3.0
R=golang-dev, rsc CC=golang-dev https://golang.org/cl/11990043
4eaf91a7 · Rémy Oudompheng · fc32bfa9 · 4eaf91a7
Commit 4eaf91a7 authored Jul 30, 2013 by Rémy Oudompheng
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bisonerrors src/cmd/gc/bisonerrors +3 -0

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--- a/src/cmd/gc/bisonerrors
+++ b/src/cmd/gc/bisonerrors
@@ -35,6 +35,9 @@ grammar && NF>0 {
 	}
 	rulelhs[$1] = r
 	rulesize[$1] = NF-2
+	if(rulesize[$1] == 1 && $3 == "%empty") {
+		rulesize[$1] = 0
+	}
 	if(rulesize[$1] == 3 && $3 $4 $5 == "/*empty*/") {
 		rulesize[$1] = 0
 	}