INSTALL.md

Building Tiramisu (Long Version)

Tiramisu has been well tested on Linux Ubuntu (18.04) and MacOS (10.12), if you find any problem installing Tiramisu please consider using one of these systems.

Prerequisites

For MacOs, we provide instructions on how to install the missing packages using Homebrew but you can install these packages using any other way. If you do not have Homebrew, you can install it as described here.

If you are installing Tiramisu on Ubuntu 18.04, you can install all the required packages for generating CPU code by running the following command

  sudo apt-get install autoconf libtool git cmake gcc g++ libpng-dev zlib1g-dev libjpeg-dev

The next section provides more details about the installation of these prerequisites.

Required

1. CMake: version 3.5 or greater.

    # On Ubuntu
    sudo apt-get install cmake
   
    # On MacOS
    sudo brew install cmake
   

2. Autoconf and libtool.

    # On Ubuntu
    sudo apt-get install autoconf libtool
   
    # On MacOS
    sudo brew install autoconf libtool
   

Optional Packages

1. OpenMPI and OpenSSh: to run the generated distributed code (MPI).

    # On Ubuntu
    sudo apt-get install openmpi-bin openmpi-common libopenmpi-dev libopenmpi-dbg
    sudo apt-get install openssh-client openssh-server
   
    # On MacOs
    sudo brew install open-mpi
    sudo brew install openssh
   

2. CUDA Toolkit: to run the generated CUDA code.

    # Downalod and install the CUDA toolkit
    https://developer.nvidia.com/cuda-toolkit
   

Tiramisu requires the following packages to be installed: ISL, Halide and LLVM. The user is supposed to install them by running the script ./utils/scripts/install_submodules.sh <TIRAMISU_ROOT_PATH>. If the script fails, the user can still install them manually as described below.

Building ISL

Install the ISL Library as follows

    cd 3rdParty/isl
    mkdir build/
    ./configure --prefix=$PWD/build/ --with-int=imath
    make -j
    make install

After installing ISL, you need to update the following paths in configure.cmake to point to the ISL prefix (include and lib directories)

ISL_INCLUDE_DIRECTORY: path to the ISL include directory
ISL_LIB_DIRECTORY: path to the ISL library (lib/)

If the above fails, check the ISL README file for details on how you should install it in general. Make sure that autoconf and libtool are installed on your system before building ISL.

Building LLVM

LLVM-5.0 or greater: required by the Halide framework. Check the section "Acquiring LLVM" in the Halide README for details on how to get LLVM, build and install it.

Building Halide

You need first to set the variable LLVM_CONFIG_BIN to point to the folder that contains llvm-config in the installed LLVM. You can set this variable in configure.cmake. If you installed LLVM from source in a directory called build/, the path is usually set as follows

LLVM_CONFIG_BIN=<path to llvm>/build/bin/

If you installed LLVM from the distribution packages, you need to find where it was installed and make LLVM_CONFIG_BIN point to the folder that contains llvm-config.

To get the Halide submodule and compile it run the following commands (in the Tiramisu root directory)

git submodule update --init --remote
cd Halide
git checkout tiramisu
make -j

You may get an access rights error from git when running trying to retrieve Halide. To solve this error, be sure to have your machine's ssh key added to your github account, the steps to do so could be found HERE.

Halide requires also libdl and libpthread. Both libraries should be available on every Linux and MacOs system and do not installation usually but you might need to install them if you get an error such as "-ldl not found" or "-lpthread not found".

Building Tiramisu

To build Tiramisu, assuming you are in the Tiramisu root directory

    mkdir build
    cd build
    cmake ..
    make -j tiramisu

You need to add the Halide library path to your system library path.

# On Ubuntu
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:<TIRAMISU_ROOT_DIRECTORY>/3rdParty/Halide/lib/

# On MacOs
export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:<TIRAMISU_ROOT_DIRECTORY>/3rdParty/Halide/lib/