From: nobu.nokada@...
Date: 2002-08-04T11:36:26+09:00
Subject: Re: passing arguments to extconf.rb

Hi,

At Sun, 4 Aug 2002 03:36:27 +0900,
Danny van Bruggen wrote:
> To get a --debug flag accepted by extconf.rb, I've put this function in
> it:
> 
> def have_flag(flag)
> 	if $configure_args['--'+flag]
> 		$defs.push("-D#{flag.upcase}")
> 		return true
> 	end
> 	return false
> end

mkmf.rb has arg_config, but it doesn't change any global status
including $defs.

How about this?

def have_flag(flag, default)
  return false if arg_config("--no-#{flag}")
  return false unless val = arg_config("--#{flag}", default)
  flag = "-D" << flag.tr('-a-z', '_A-Z')
  flag << "=#{val}" if String === val
  $defs.push(flag)
  true
end

-- 
Nobu Nakada