Ledger Blue development environment

Developping applications for Ledger Blue requires a specific SDK and two compilers

A standard ARM gcc to build the non-secure (STM32) firmware and link the secure (ST31) applications
A standard ARM clang above 4.0.0 with ROPI support to build the secure (ST31) applications

Setting up the environment

Pick a directory, linking the environment variable BOLOS_ENV to it
Download a prebuild gcc from https://launchpad.net/gcc-arm-embedded/+milestone/5-2016-q1-update and unpack it into this directory
Download a prebuild clang from http://releases.llvm.org/download.html#4.0.0 and unpack it into this directory, then link this directory to clang-arm-fropi or rename it

Adding the Nano S SDK

Download the Nano S SDK from https://github.com/ledgerhq/nanos-secure-sdk and link the environment variable BOLOS_SDK to it. You'll have to checkout the tag matching your firmware version.

Adding the Blue SDK

Download the Blue SDK from https://github.com/ledgerhq/blue-secure-sdk and link the environment variable BOLOS_SDK to it. You'll have to checkout the tag matching your firmware version.

Troubleshooting

If you get missing include files on an x64 linux device, make sure to install the libc6-i386 and libc6-dev-i386 packages

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