From: Hugh Sasse Staff Elec Eng <hgs@...>
Date: 2002-02-07T19:22:28+09:00
Subject: Re: mkmf, extconf.rb

On Thu, 7 Feb 2002 nobu.nokada@softhome.net wrote:

> Hi,
>
> At Thu, 7 Feb 2002 01:11:49 +0900,
> Hugh Sasse Staff Elec Eng <hgs@dmu.ac.uk> wrote:
> > Further to my suggestions in Ruby-Talk:31391, about adding methods to
> > mkmf so that rules can be added to makefiles, I have "lashed together"
> > the following patch.  It works with an array of dependencies, but before
> > I test all the combinations of arguments permitted, has anyone any
> > comments?
>
> I guess you can do it with `depend' file.

I have found that bit of code in mkmf:

  depend = File.join(srcdir, "depend")
  if File.exist?(depend)
    dfile = open(depend, "r")
    mfile.printf "###\n"
    while line = dfile.gets()
      mfile.printf "%s", line.gsub(/\.o\b/, ".#{$OBJEXT}")
    end
    dfile.close
  end

I don't think you can use this for adding more make rules, because it is
not completely transparent.  Suppose your action includes  ruby code
which does 'gsub(/\.o\b/, ".#{$OBJEXT}")'.  This will get rendered as
"gsub(/\.#{$OBJEXT}\b/" etc.


Maybe this could be extracted to a method, and have the substitution
optional?

>
> --
> Nobu Nakada
>
	Hugh