PPU toolchain

This repository contains build instructions for the PPU (Plasticity Processing Unit) toolchain. It is the toplevel repository of the compiler/linker toolchain consisting of

• binutils-gdb: patched linker/assembler, gdb and object file helpers
• gcc: patched C, C++ compiler and libstdc++
• newlib: patched C library

How to build

Clone the repositories:

binutils-gdb@binutils-2_25-branch-nux
gcc@nux-on-gcc-4_9_4-release
newlib@master
oppulance@master

Each repository contains numbered build scripts in

repo/ci/*.sh

which are to be executed in the repository order above and in ascending number order inside a repository.

During build, a build folder will be created for each repository, namely

build_binutils
build_gcc
build_newlib
build_libstdc++

and an install folder for installation.

Usage of local build

Prepend PATH with install/bin and LD_LIBRARY_PATH with install/lib. For usage in singularity containers, SINGULARITYENV_PREPEND_PATH and SINGULARITYENV_LD_LIBRARY_PATH are to be set in the same way.

Usage once deployed

The toolchain is built and deployed by a continuous integration Jenkins job. Is can be loaded via

	module load ppu-toolchain

on either a frontend or cluster nodes.

Migrate from toolchain without operating system target (i.e. -eabi)

The operating system target is ppu and the architecture is powerpc, therefore the binaries will be named like:

powerpc-ppu-gcc
powerpc-ppu-nm

For linking the toolchain with libc and libstdc++ using waf, the ordered list of ['stdc++', 'c', 'm', 'g', 'gcc'] needs to be appended to conf.env.STLIB in the configure step of the wscript.