https://git.ruby-lang.org/ruby.git/commit/?id=5717e55e9a

From 5717e55e9a7790c938afa694a9bf558c0e54bb83 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Sat, 5 Oct 2019 07:00:07 +0900
Subject: ext/json/parser/prereq.mk: Add a "automatically generated" header

to parser.c.

diff --git a/ext/json/parser/parser.c b/ext/json/parser/parser.c
index 2d13bcc..fb10491 100644
--- a/ext/json/parser/parser.c
+++ b/ext/json/parser/parser.c
@@ -1,3 +1,4 @@ https://github.com/ruby/ruby/blob/trunk/ext/json/parser/parser.c#L1
+/* This file is automatically generated from parser.rl by using ragel */
 
 #line 1 "parser.rl"
 #include "../fbuffer/fbuffer.h"
diff --git a/ext/json/parser/prereq.mk b/ext/json/parser/prereq.mk
index be7bcb4..386999b 100644
--- a/ext/json/parser/prereq.mk
+++ b/ext/json/parser/prereq.mk
@@ -5,6 +5,7 @@ RAGEL = ragel https://github.com/ruby/ruby/blob/trunk/ext/json/parser/prereq.mk#L5
 .rl.c:
 	$(RAGEL) -G2 $<
 	$(BASERUBY) -pli -e '$$_.sub!(/[ \t]+$$/, "")' \
-	-e '$$_.sub!(/^static const int (JSON_.*=.*);$$/, "enum {\\1};")' $@
+	-e '$$_.sub!(/^static const int (JSON_.*=.*);$$/, "enum {\\1};")' \
+	-e '$$header ||= $$_ = "/* This file is automatically generated from parser.rl by using ragel */\n" + $$_' $@
 
 parser.c:
-- 
cgit v0.10.2


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