From: Paul Duncan <pabs@...>
Date: 2004-10-23T01:04:45+09:00
Subject: Re: Problem writting bindings

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* Erwan Loisant (eloisant@gmail.com) wrote:
> Hello.
>=20
> I am writing Ruby bindings for a C library that I wrote myself. I have
> a problem when running extconf.
>=20
> My library uses glib so I added glib also.
>=20
> ----
> erwan@bourricot Galois $ cat extconf.rb
> require 'mkmf'
>=20
> dir_config('libGalois')
> dir_config('glib')
>=20
> have_library('glib')
> have_library('libGalois')
>=20
> create_makefile('GaloisNode')
> ----
>=20
> Then I launch extconf.rb:
>=20
> ----
> erwan@bourricot Galois $ ruby extconf.rb
> --with-libGalois-dir=3D/usr/local/
> checking for main() in -lglib... yes
> checking for main() in -llibGalois... no
> creating Makefile
> ----
>=20
> The problem is in the generated Makefile, "-lglib" is added but not
> "-llibGalois". I guess the "checking for main() in -llibGalois... no"
> is the error message related to the problem but I can't figure what it
> means. A library is not supposed to have main() loop, right?

You should pass a function in the library to the have_library method,
like this:

  have_library('glib', 'g_timer_start')

My guess is you'll want the other have_library call to look like this:

  have_library('Galois', 'func_name') # note the omitted 'lib' prefix

Hope that helps...

--=20
Paul Duncan <pabs@pablotron.org>        pabs in #ruby-lang (OPN IRC)
http://www.pablotron.org/               OpenPGP Key ID: 0x82C29562

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