From: "Iñaki Baz Castillo" <ibc@...>
Date: 2012-05-28T19:57:06+09:00
Subject: [C exten] extconf.rg and #ifdef

Hi, depending whether my Ruby C extension is being compiled on *nix or
Windows, I need some #defines (i.e: OS_UNIX or OS_WIN).

I see no way in MKMF documentation to generate a #define (based on
RbConfig["host_os"] for example). I've seen some "hacks" in extconf.rb
like this:

---------------------------------------
  def add_define(name)
    $defs.push("-D#{name}")
  end

  # If I'm on *nix:
  add_define "OS_UNIX"
---------------------------------------

Is this the most ellegant way? any other solution?

Thanks a lot.

-- 
Iñaki Baz Castillo
<ibc@aliax.net>