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From: Rainer Weikusat <rweikusat@mssgmbh.com>
Newsgroups: comp.os.linux.development.apps
Subject: Re: Linking problem
Date: Fri, 16 Dec 2011 17:46:42 +0000
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Kevin Nathan <knathan@project54.com> writes:
> On Fri, 16 Dec 2011 00:47:10 +0000
> Rainer Weikusat <rweikusat@mssgmbh.com> wrote:
>
>>Forget --sysroot. You need to add your include directories with -I,
>>add your library directories with -L and add them again with -Wl,-R
>>and that's it. If the binaries are still linked against system
>>libraries you don't want, something is still missing in your custom
>>library directory.
>
> That was the ticket! I am 99% there, now. By using this:
>
> export LDFLAGS=" -Wl,-R /home/username/progroot/lib/

[...]

> all the libs listed in "ldd program" are properly pointed to my local
> libs locations. However, I still have one lib that will not get the
> local subdir: /lib/ld-linux.so.2 (the dynamic loader).

I have to deal with a couple of 'legacy' Debian 5 installations where
I have a 'manually compiled' glibc-2.11 in /usr/local/glibc-2.11 in
order to get access to some newer kernel features. There are also
a couple of additional libraries linked with this C library which need
to be used in place of the system-provided ones. I'm using this script
as 'gcc frontend':

[rw@error]~/build/ipsec-tools/build $cat /usr/local/glibc-2.11/bin/gcc
#!/bin/sh
#
G2_11=/usr/local/glibc-2.11
exec gcc -isystem $G2_11/include -L $G2_11/lib -Wl,-dynamic-linker -Wl,$G2_11/lib/ld-linux.so.2 -Wl,-R$G2_11/lib "$@"

An example configure invocation could then look like this:

	CC=/usr/local/glibc-2.11/bin/gcc ./configure ....