This repository contains scripts to build the HermitCore's cross-compiler, which based on the library OS HermitCore.

The build process works currently only on x86-based Linux systems. The following software packets are required to build HermitCore's toolchain on a Linux system:

• Netwide Assembler (NASM)
• GNU Make, GNU Binutils, cmake
• Tools and libraries to build linux, binutils and gcc (e.g. flex, bison, MPFR library, GMP library, MPC library)
• texinfo

On Debian-based systems the packets can be installed by executing:

  sudo apt-get install nasm texinfo libmpfr-dev libmpc-dev libgmp-dev flex bison

We require a fairly recent version of CMake (3.7) which is not yet present in most Linux distributions. We therefore provide a helper script that fetches the required CMake binaries from the upstream project and stores them locally, so you only need to download it once.

$ . cmake/local-cmake.sh
-- Downloading CMake
--2017-03-28 16:13:37--  https://cmake.org/files/v3.7/cmake-3.7.2-Linux-x86_64.tar.gz
Loaded CA certificate '/etc/ssl/certs/ca-certificates.crt'
Resolving cmake.org... 66.194.253.19
Connecting to cmake.org|66.194.253.19|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 30681434 (29M) [application/x-gzip]
Saving to: ‘cmake-3.7.2-Linux-x86_64.tar.gz’

cmake-3.7.2-Linux-x86_64.tar.gz         100%[===================>]  29,26M  3,74MB/s    in 12s     

2017-03-28 16:13:50 (2,48 MB/s) - ‘cmake-3.7.2-Linux-x86_64.tar.gz’ saved [30681434/30681434]

-- Unpacking CMake
-- Local CMake v3.7.2 installed to cmake/cmake-3.7.2-Linux-x86_64
-- Next time you source this script, no download will be neccessary

So before you build HermitCore's toolchain you have to source the local-cmake.sh script everytime you open a new terminal.

To build the toolchain just call the script as follow:

$ ./toolchain.sh x86_64-hermit /home/usr/hermit

The first argument of the script specifies the target architecture, where the second argument defines the path to the installation directory. Do create the toolchain, write access to the installation directory is required.