From 19beb028e70d6e6893b0fb1107eb95428256588b Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 15 Oct 2021 19:43:39 +0900
Subject: Make explicit opening files

---
 lib/mkmf.rb | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 79dd3f7172..c9eac56702 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -447,7 +447,7 @@ EOM
     src.sub!(/[^\n]\z/, "\\&\n")
     count = 0
     begin
-      open(conftest_source, "wb") do |cfile|
+      File.open(conftest_source, "wb") do |cfile|
         cfile.print src
       end
     rescue Errno::EACCES
@@ -1738,7 +1738,7 @@ SRC
     hdr = hdr.join("")
     log_src(hdr, "#{header} is")
     unless (IO.read(header) == hdr rescue false)
-      open(header, "wb") do |hfile|
+      File.open(header, "wb") do |hfile|
         hfile.write(hdr)
       end
     end
@@ -2350,7 +2350,7 @@ CLEANOBJS     = *.#{$OBJEXT} #{config_string('cleanobjs') {|t| t.gsub(/\$\*/, "$
 " #"
 
     conf = yield(conf) if block_given?
-    mfile = open("Makefile", "wb")
+    mfile = File.open("Makefile", "wb")
     mfile.puts(conf)
     mfile.print "
 all:    #{$extout ? "install" : target ? "$(DLLIB)" : "Makefile"}
-- 
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