* ext/io/wait/extconf.rb: removed unnecessary backward compatibility stuff.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4139 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 20 deletions

diff --git a/ext/io/wait/extconf.rb b/ext/io/wait/extconf.rb
index 0c1a870474..a766ccbe6f 100644
--- a/ext/io/wait/extconf.rb
+++ b/ext/io/wait/extconf.rb
@@ -1,28 +1,12 @@
 require 'mkmf'
 target = "io/wait"
-unless defined?(checking_for)
-  def checking_for(msg)
-    STDOUT.print "checking for ", msg, "..."
-    STDOUT.flush
-    STDOUT.puts((r = yield) ? "yes" : "no")
-    r
-  end
-end
-unless defined?(macro_defined?)
-  def macro_defined?(macro, src, opt="")
-    try_cpp(src + <<"SRC", opt)
-#ifndef #{macro}
-# error
-#endif
-SRC
-  end
-end
 
 unless /djgpp|mswin|mingw|human/ =~ RUBY_PLATFORM
   fionread = %w[sys/ioctl.h sys/filio.h].find do |h|
     checking_for("FIONREAD") {macro_defined?("FIONREAD", "#include <#{h}>\n")}
   end
-  exit 1 unless fionread
-  $defs << "-DFIONREAD_HEADER=\"<#{fionread}>\""
-  create_makefile(target)
+  if fionread
+    $defs << "-DFIONREAD_HEADER=\"<#{fionread}>\""
+    create_makefile(target)
+  end
 end