document build steps in readme

README.md

@@ -1,18 +1,29 @@
 # Monero C++ Library
 
-A lightweight wrapper of Monero's core c++ wallet ([wallet2.h](https://github.com/monero-project/monero/blob/master/src/wallet/wallet2.h)) with focus on ease-of-use and which conforms to the specification defined [here](https://github.com/monero-ecosystem/monero-javascript/blob/master/monero-model.pdf).
+This project is a lightweight wrapper of Monero's core c++ wallet, ([wallet2.h](https://github.com/monero-project/monero/blob/master/src/wallet/wallet2.h)), which focuses on ease-of-use and which conforms to the specification defined [here](https://github.com/monero-ecosystem/monero-javascript/blob/master/monero-model.pdf).
 
-# See Also
+## Building a Dynamic / Shared Library
+
+The source code in this project may be built as a dynamic or "shared" library for use on a target platform (e.g. Linux, Mac, Windows, etc).  For example, the associated [Java reference implementation](https://github.com/monero-ecosystem/monero-java-rpc) depends on a dynamic library built from this project to support a wallet using JNI.
+
+### Build Steps
+
+1. Download the boost source code to ./external/boost-sdk
+2. Download the OpenSSL source code to ./external/openssl-sdk
+3. Build dependent libraries (boost, hidapi, libsodium, monero-core, and OpenSSL) and place .a files in corresponding folders in ./external-libs per CMakeLists.txt (todo: document/automate further)
+4. Build ./build/libmonero-cpp.dylib: `./bin/build-libmonero-java.sh`
+
+## See Also
 
 [Java reference implementation](https://github.com/monero-ecosystem/monero-java-rpc)
 
 [JavaScript reference implementation](https://github.com/monero-ecosystem/monero-javascript)
 
-## License
+### License
 
 This project is licensed under MIT.
 
-## Donate
+### Donate
 
 <p align="center">
 	<img src="donate.png" width="150" height="150"/>