installing glibc 2.1.x and 2.2.x in parallel?

[Harald Dunkel <harri@synopsys.COM>]

Hi folks,

Due to a broken 3rd party library I am bound to the glibc 2.1.x
runtime libs. My build machine is running RedHat 6.2, but of course
I want to make sure that my executable work on Woody, too.

Is there a way to install glibc 2.1.x and 2.2.x in parallel, as it 
has been done for the different versions of libstdc++.so.* ?

I tried to install the glibc 2.1.x libs in a seperate subdir
and modify $LD_LIBRARY_PATH accordingly, but this failed due
to /lib/ld-linux.so.2 relying upon glibc 2.2.x. Next step was
to preload the 2.1.x version of ld-linux.so.2 using $LD_PRELOAD.
The result was a core dump of the executable.

??? 


Any help would be highly appreciated. Regards

Harri