linking of static libs together ??

[vl_ <vlyamtsev@xxxxxxxxx>]

Hello,
I have makefie that produces 3 '.a' files. Can someone recommend some
simple way of merging them into one static lib? For now I do it
"manually", e.g. use "ar -q 3.a `ls 2/*.o`" to add objects from '2.a'
build directory into 3.a
but is there a way of linking them directly?
Thanks,
-V