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Marco Oliverio
71 lines
2.1 KiB
Markdown
71 lines
2.1 KiB
Markdown
# Gaisler BCC
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This document outlines how to compile for the Gaisler LEON range of Sparc CPUs
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using the BCC2 toolkit. The steps here should also work for the original BCC.
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## Compiler
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In the examples in this document, a Linux computer is used as a cross compiler
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and the compilers have been extracted to `/opt`. You can install them elsewhere,
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but please adjust commands accordingly.
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### Bare-metal
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To compile for bare-metal, you need to download the BCC2 binaries from
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[here](https://www.gaisler.com/index.php/downloads/compilers). You can use
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either the GCC or CLang version, but do note that you will need to set the
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CFLAG `-std=c99` to compile in CLang.
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### Linux
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For Linux, you will need the "GNU toolchains for LEON and NOEL" from
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[this link](https://www.gaisler.com/index.php/downloads/linux).
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## Compiling
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### Bare metal
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Copy the file `examples/config/user_settings_template.h` to `user_settings.h` in
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the root of the source code. Then edit this to add the following:
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```c
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#define WOLFSSL_GAISLER_BCC
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#define WOLFSSL_GENSEED_FORTEST
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#define NO_ASN_TIME
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```
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and comment out the following line:
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```
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// #define NO_MAIN_DRIVER
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```
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The first `#define` is only required to compile the wolfCrypt benchmark.
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**Note:** that most Gaisler LEON processors do not have a good source of
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entropy for the RNG. It is recommended an external entropy source is used when
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developing for production.
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You can then compile with the following. Change the `mcpu` and `qbsp` according
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to the LEON CPU version and board used:
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```sh
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export CC=/opt/sparc-bcc-2.3.1-gcc/bin/sparc-gaisler-elf-gcc
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export CXX=/opt/sparc-bcc-2.3.1-gcc/bin/sparc-gaisler-elf-g++
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export CFLAGS="-qbsp=gr740 -mcpu=leon3"
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./configure --host=sparc --enable-usersettings --disable-examples --enable-static
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make
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```
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### Linux
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To compile for Linux on the LEON use the following commands, make sure to use the right `mcpu` option:
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```sh
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export CC=/opt/sparc-gaisler-linux5.10/bin/sparc-gaisler-linux5.10-gcc
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export CXX=/opt/sparc-gaisler-linux5.10/bin/sparc-gaisler-linux5.10-g++
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export CFLAGS="-mcpu=leon3"
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./configure --host=sparc-linux
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make
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```
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