Ruby 2 0 0p0 IRB warning DL is deprecated please use Fiddle

Question

I just uninstalled my older versions of Ruby  removed all of my gems  including Rails   and installed Ruby 2 0  In other words  a totally clean re-install  Upon starting IRB  I received this message    DL is deprecated  please use Fiddle   Note  I m on a Windows machine   What does this message mean

User · Answer

I ran into this myself when I wanted to make a thor command under Windows.

To avoid having that message output everytime I ran my thor application I temporarily muted warnings while loading thor:

begin
  original_verbose = $VERBOSE
  $VERBOSE = nil
  require "thor"
ensure
  $VERBOSE = original_verbose
end

That saved me from having to edit third party source files.

User · Answer

The message you received is common when you have ruby 2 0 0p0  2013-02-24  on top of Windows   The message  DL is deprecated  please use Fiddle  is not an error  it s only a warning   The source is the Deprecation notice for DL introduced some time ago in dl rb   see revisions 37910     On Windows the lib ruby site ruby 2 0 0 readline rb file still requires dl rb so the warning message comes out when you require  irb    because irb requires  readline    or when anything else wants to require  readline    You can open readline rb with your favorite text editor and look up the code   near line 4369         if RUBY VERSION  lt   1 9 1        require  Win32API      else       require  dl        class Win32API         DLL        We can always hope for an improvement to work out this deprecation in future releases of Ruby   EDIT  For those wanting to go deeper about Fiddle vs DL  let it be said that their purpose is to dynamically link external libraries with Ruby  you can read on the ruby-doc website about DL or Fiddle

User · Answer

I got this resolution at openshift com   Resolution      This error occurs only on Windows machine with Ruby 2 0 0 version    Until we officially support Ruby 2 0 please downgrade to Ruby 1 9       On Windows  you can install Ruby 1 9 3 alongside 2 0  Change your    PATH  to c  ruby193  or whatever directory you installed to prior   to installing the gem

User · Answer

The message  DL is deprecated  please use Fiddle  is not an error  it s only a warning  Solution  You can ignore this in 3 simple steps  Step 1  Goto C  RailsInstaller Ruby2 1 0 lib ruby 2 1 0 Step 2  Then find dl rb and open the file with any online editors like   Aptana sublime text etc Step 3   Comment the line 8 with     ie   warn  DL is deprecated  please use Fiddle    That s it  Thank you

User · Answer

You may want to comment out the DL is deprecated  please use Fiddle warning at    C  Ruby200 lib ruby 2 0 0 dl rb   since it   s annoying and you are not the irb pry or some other gems code owner

[ruby] Ruby 2.0.0p0 IRB warning: "DL is deprecated, please use Fiddle"

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