32 bit app with 64 bit shared library

[David Turnbull]

Is it possible to combine a 64-bit shared library with a 32-bit application.

Currently we have a 32-bit app which calls a function in our shared library, passing in some structs and pointers to be updated.

The shared library updates the data and returns.

We have to make the shared library 64-bit as it now requires shared memory segments > 3Gig. This segment is not required by the 32-bit application.

Is it possible to have the 32-bit app link with the 64-bit shared library ?

[Cheryl Griffin]

Look here for your answer about program compatibility.
Developers Resource page -
http://devresource.hp.com/STK/ia64from11x.html

Here's an excerpt:
"Your software is not a library. Since 32-bit applications can only link with 32-bit libraries and 64-bit applications can only link with 64-bit libraries, if you plan to provide support for both 32-bit applications and 64-bit applications, you must provide both 32-bit and 64-bit versions of your libraries. "