wolfssl/IDE/Gaisler-BCC/README.md

Gaisler BCC

This document outlines how to compile for the Gaisler LEON range of Sparc CPUs using the BCC2 toolkit. The steps here should also work for the original BCC.

Compiler

In the examples in this document, a Linux computer is used as a cross compiler and the compilers have been extracted to /opt. You can install them elsewhere, but please adjust commands accordingly.

Bare-metal

To compile for bare-metal, you need to download the BCC2 binaries from here. You can use either the GCC or CLang version, but do note that you will need to set the CFLAG -std=c99 to compile in CLang.

Linux

For Linux, you will need the "GNU toolchains for LEON and NOEL" from this link.

Compiling

Bare metal

Copy the file examples/config/user_settings_template.h to user_settings.h in the root of the source code. Then edit this to add the following:

#define WOLFSSL_GAISLER_BCC
#define WOLFSSL_GENSEED_FORTEST

The first #define is only required to compile the wolfCrypt benchmark.

Note: that most Gaisler LEON processors do not have a good source of entropy for the RNG. It is recommended an external entropy source is used when developing for production.

You can then compile with the following. Change leon5 to the LEON CPU version used:

export CC=/opt/sparc-bcc-2.3.1-gcc/bin/sparc-gaisler-elf-gcc
export CXX=/opt/sparc-bcc-2.3.1-gcc/bin/sparc-gaisler-elf-g++
export CFLAGS="-mcpu=leon5"

./configure --host=sparc --enable-usersettings --disable-examples --enable-static
make

Linux

To compile for Linux on the LEON use the following commands:

export CC=/opt/sparc-gaisler-linux5.10/bin/sparc-gaisler-linux5.10-gcc
export CXX=/opt/sparc-gaisler-linux5.10/bin/sparc-gaisler-linux5.10-g++
export CFLAGS="-mcpu=leon5"

./configure --host=sparc-linux
make