To update the Boost version (or to add a new library) follow these steps:
- Download Boost and extract the package, then launch Powershell and `cd` to the `boost_1_xx_0` directory.
- Build the `bcp` tool:
```
.\boostrap.bat
.\b2 tools\bcp
```
- Store the boost directory in a variable for later use: `$boost_dir = $pwd`.
- Add bcp to your path: `$env:Path += $boost_dir\bin.v2\tools\bcp\msvc-14.1\release\link-static\threading-multi` (The correct output path should be printed by b2 during the build.)
-`cd` to this repo's directory (`...\externals\boost\`)
- Remove the existing boost from the repo: `rm -r boost` (This is only necessary if doing a Boost version upgrade, in case they removed any files in the new version.)
- Run `.\build.cmd $boost_dir` to build a new trimmed down distro.