From: Michal Rokos <m.rokos@...>
Date: 2003-07-21T18:17:57+09:00
Subject: Re: [RFC] Add have_defined() and rework have_struct_member()

Hello,

On Mon, Jul 21, 2003 at 05:47:21PM +0900, nobu.nokada@softhome.net wrote:
> At Mon, 21 Jul 2003 17:12:59 +0900,
> Michal Rokos wrote:
> > I'm trying to bring OpenSSL < 0.9.6 to OSSL2 module and while doing this
> > I needed to test whether some constats and functions are defined in
> > some.h.
> > 
> > I didn't find the way to do this in current mkmf.rb, so I defined
> > function have_defined() to solve this.
> 
> There is macro_defined? function.
> 

Hmm, you're right.

Unfortunately macro_defined? doesn't set and $defs. So you will do

def have_defined(macro, header=nil)
  checking_for "#{macro}" do
    if macro_defined?(macro, cpp_include(header))
      $defs.push(format("-DHAVE_%s", macro.upcase))
      true
    else
      false
    end
  end
end

everytime... I still think that have_defined() worth to be in mkmf.rb...

	Michal

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Michal Rokos                         Czech Technical University, Prague
e-mail: m.rokos@sh.cvut.cz    icq: 36118339     jabber: majkl@jabber.cz
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