https://git.ruby-lang.org/ruby.git/commit/?id=11aa07c270

From 11aa07c27071878d9f7748995febe7df96f0405d Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 10 Nov 2019 10:52:12 +0900
Subject: Define NULLCMD as printing NUL [Bug #16331]


diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 88ba8b5..20f7315 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -4,7 +4,7 @@ SHELL = $(COMSPEC) https://github.com/ruby/ruby/blob/trunk/win32/Makefile.sub#L4
 ECHO1 = $(V:1=@:)
 RUNCMD = $(COMSPEC) /c
 MKFILES = Makefile verconf.mk
-NULLCMD = :
+NULLCMD = type nul
 NULL = nul
 CHDIR = cd
 PATH_SEPARATOR = ;
-- 
cgit v0.10.2


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