Whether Can ARM compiler 5 project call the library compiled by ARM compiler 6?

HI, all,

To optimize an algorith(coded by C) performance, I compiled the algorithm as  a library with ARM compiler 6.

But another problem appears that the library will be called by older ARM compiler 5 project.

I want to know:

1) Whether Can ARM compiler 5 project call library compiled by ARM compiler 6?

2) if 1) is ok, How to use the lib in ARM compiler 5 project ?

Regard!