Subject: Re: rpath flags vs wrapper scripts
To: None <>
From: Joerg Sonnenberger <>
List: tech-pkg
Date: 10/31/2005 13:16:07
On Sun, Oct 30, 2005 at 08:51:57PM -0500, Dan McMahill wrote:
> I think I'm missing something here.  libtool is used for building 
> libwcalc already.  If someone wants to link to libwcalc, it seems like 
> they should be able to just do
>   cc -o foo foo.c `wcalc-config --libs`
> but that doesn't quite work unless you can get the correct rpath flags 
> into wcalc-config.  I took a look at x11/gtk/patch-af and the -Wl,-Rpath 
> is just hard patched into gtk-config, but I wonder if that is a portable 
>  thing or not.

I wouldn't hard code the value, but take a look at the
hardcode_libdir_flag_spec in libtool.m4. That should be the variable you
need. Or use pkg-config magic.

> It seems that `pkg-config gtk+-2.0 --libs` also gives  rpath flags 
> because they are listed in /usr/pkg/lib/pkgconfig/gtk+-2.0.pc.  Further 
> digging shows that the magic variable PKGCONFIG_OVERRIDE is what adds 
> the rpath flags.  So I guess I could use pkg-config for libwcalc instead 
> of wcalc-config.

Use pkg-config instead of yet another wrapper script, it saves the life
of many dolphins :-)