From 545dbd8a189911ac4330601bfd87bedd7a593f5b Mon Sep 17 00:00:00 2001
From: Benoit Daloze <eregontp@gmail.com>
Date: Thu, 9 Aug 2018 10:46:03 +0200
Subject: [PATCH] Make the check for the availability of fork() more precise

---
 lib/puma/launcher.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/puma/launcher.rb b/lib/puma/launcher.rb
index c6ee7b77..e57250ce 100644
--- a/lib/puma/launcher.rb
+++ b/lib/puma/launcher.rb
@@ -63,8 +63,8 @@ module Puma
 
       generate_restart_data
 
-      if clustered? && (Puma.jruby? || Puma.windows?)
-        unsupported 'worker mode not supported on JRuby or Windows'
+      if clustered? && !Process.respond_to?(:fork)
+        unsupported "worker mode not supported on #{RUBY_ENGINE} on this platform"
       end
 
       if @options[:daemon] && Puma.windows?