Prefer ruby_install_name as runner

`Gem::Commands::EnvironmentCommand` expects that `Gem.ruby` has
the transformed basename.

1 files changed, 3 insertions, 2 deletions

diff --git a/tool/runruby.rb b/tool/runruby.rb
index 4715ff4d5c..9562efc00d 100755
--- a/tool/runruby.rb
+++ b/tool/runruby.rb
@@ -85,7 +85,8 @@ config = File.read(conffile)
 config.sub!(/^(\s*)RUBY_VERSION\b.*(\sor\s*)\n.*\n/, '')
 config = Module.new {module_eval(config, conffile)}::RbConfig::CONFIG
 
-ruby = File.join(archdir, config["RUBY_INSTALL_NAME"]+config['EXEEXT'])
+install_name = config["RUBY_INSTALL_NAME"]+config['EXEEXT']
+ruby = File.join(archdir, install_name)
 unless File.exist?(ruby)
   abort "#{ruby} is not found.\nTry `make' first, then `make test', please.\n"
 end
@@ -106,7 +107,7 @@ env = {
   'RUBY_FIBER_MACHINE_STACK_SIZE' => '1',
 }
 
-runner = File.join(abs_archdir, "exe/ruby#{config['EXEEXT']}")
+runner = File.join(abs_archdir, "exe/#{install_name}")
 runner = nil unless File.exist?(runner)
 abs_ruby = runner || File.expand_path(ruby)
 env["RUBY"] = abs_ruby