From owner-freebsd-current@FreeBSD.ORG  Wed Jan  4 22:13:04 2012
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Date: Wed, 4 Jan 2012 23:29:55 +0100
From: Luigi Rizzo <rizzo@iet.unipi.it>
To: Garrett Cooper <yanegomi@gmail.com>
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Cc: current@freebsd.org
Subject: Re: add 'ldd' to cross-tools ?
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On Wed, Jan 04, 2012 at 02:10:36PM -0800, Garrett Cooper wrote:
> On Wed, Jan 4, 2012 at 2:23 PM, Luigi Rizzo <rizzo@iet.unipi.it> wrote:
> > Hi,
> > in doing cross-builds of picobsd, i found i need a cross-version
> > of "ldd" so i can run it on the host to detect which shared libraries
> > are used by binaries on the target architecture
> > (for amd64->i386 there is a partial workaround, but don't know
> > if it works in other cases)
> >
> > Is there any concern in adding usr.bin/ldd to the list of cross-tools
> > in Makefile.inc1 ? It is a small program and should not increase
> > the build time in any significant way.
> >
> > Otherwise, does anyone know the magic to build a cross-arch
> > version of a program in the FreeBSD source tree ?
> 
> objdump IMO is a lot easier to parse and it's already built via cross-tools:
> 
> $ objdump -x `which tar` | awk '$1 == "NEEDED" { print $2 }'
> libarchive.so.5
> libbz2.so.4
> libz.so.6
> liblzma.so.5
> libbsdxml.so.4
> libcrypto.so.6
> libc.so.7

wonderful, thanks!

cheers
luigi