CentOS - Mar 2015 - Building a newer glibc RPM for CentOS 6 and installing into an alternate path

On Tue, Mar 31, 2015 at 12:43 PM, Alfred von Campe <alfred at
von-campe.com> wrote:
> On Mar 31, 2015, at 12:21, Jim Perrin <jperrin at centos.org> wrote:
>
>>> Isn't this the problem that docker was invented to solve?
>>
>>
>> Yes, you could address this with docker quite easily, depending on the
app.
>
> Perhaps, but I?m running CentOS 6.6 i686 (i.e., 32-bit), and it appears
that
> Docker requires 64-bit.  Oh well, I was getting my hopes up for a while. 
In
> the mean time, we?ve requested a CentOS 6 compatible .shared library from
our
> vendor, and I?m keeping my fingers crossed while waiting for their reply.
What about remote exectution?  You might  even give it access to local
files with x2go.

-- 
   Les Mikesell
     lesmikesell at gmail.com

Les Mikesell wrote:
> On Tue, Mar 31, 2015 at 12:43 PM, Alfred von Campe <alfred at
von-campe.com>
> wrote:
>> On Mar 31, 2015, at 12:21, Jim Perrin <jperrin at centos.org>
wrote:
>>
>>>> Isn't this the problem that docker was invented to solve?
>>>
>>> Yes, you could address this with docker quite easily, depending on
the
>>> app.
>>
>> Perhaps, but I?m running CentOS 6.6 i686 (i.e., 32-bit), and it appears
>> that Docker requires 64-bit.  Oh well, I was getting my hopes up for a
while.
<snip>
I haven't really been following this thread closely, but would it be a
dumb question to suggest installing the rpm with the relocate flag, and
then use LD_LIBRARY_PATH?

        mark

On Tue, Mar 31, 2015 at 1:21 PM,  <m.roth at 5-cent.us>
wrote:
>>>>
>>> Perhaps, but I?m running CentOS 6.6 i686 (i.e., 32-bit), and it
appears
>>> that Docker requires 64-bit.  Oh well, I was getting my hopes up
for a
> while.
> <snip>
> I haven't really been following this thread closely, but would it be a
> dumb question to suggest installing the rpm with the relocate flag, and
> then use LD_LIBRARY_PATH?
>
It was mentioned earlier that LD_LIBRARY_PATH doesn't work with libc,
but LD_PRELOAD should..  I tried unpacking a centos7 glibc rpm under
/tmp/c7libs on a centos 6 box and trying to run a centos7 version of
cat with:

LD_LIBRARY_PATH=/tmp/c7libs/lib64:$LD_LIBRARY_PATH
LD_PRELOAD="/tmp/c7libs/lib64/ld-linux-x86-64.so.2
/tmp/c7libs/lib64/libc.so.6"   /tmp/cat-7 /tmp/test

seems to work, but that's not a real demanding test...

-- 
   Les Mikesell
     lesmikesell at gmail.com