https://git.ruby-lang.org/ruby.git/commit/?id=12883f8fa6

From 12883f8fa6222324880e2b0f161f8c6d6cf365c7 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 6 Nov 2022 23:39:55 +0900
Subject: GNU make 4.4 now uses a fifo for the jobserver

---
 tool/lib/test/unit.rb | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tool/lib/test/unit.rb b/tool/lib/test/unit.rb
index 59409f016c..fb1a53ce05 100644
--- a/tool/lib/test/unit.rb
+++ b/tool/lib/test/unit.rb
@@ -286,10 +286,15 @@ module Test https://github.com/ruby/ruby/blob/trunk/tool/lib/test/unit.rb#L286
         @jobserver = nil
         makeflags = ENV.delete("MAKEFLAGS")
         if !options[:parallel] and
-          /(?:\A|\s)--jobserver-(?:auth|fds)=(\d+),(\d+)/ =~ makeflags
+          /(?:\A|\s)--jobserver-(?:auth|fds)=(?:(\d+),(\d+)|fifo:(.*))/ =~ makeflags
           begin
-            r = IO.for_fd($1.to_i(10), "rb", autoclose: false)
-            w = IO.for_fd($2.to_i(10), "wb", autoclose: false)
+            if fifo = $3
+              r = File.open(fifo, IO::RDONLY|IO::NONBLOCK|IO::BINARY, autoclose: false)
+              w = File.open(fifo, IO::WRONLY|IO::NONBLOCK|IO::BINARY, autoclose: false)
+            else
+              r = IO.for_fd($1.to_i(10), "rb", autoclose: false)
+              w = IO.for_fd($2.to_i(10), "wb", autoclose: false)
+            end
           rescue
             r.close if r
             nil
-- 
cgit v1.2.3


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