Do we need to build Boost for Botan?

Botan is a c++ crypto library which includes ZFEC support. We want to use its ZFEC libraries.

Botan uses boost, and boost uses a custom b2 build system which doesn't immediately cross-compile for Android.

...but also boost has a lot of "header-only" libraries: so it's possible we don't need to "build" boost at all for Botan.

Does Botan need any built boost libraries?