janvitek / rift

Playing with llvm

Installation

The following guide assumes Linux machine (Ubuntu 16.04 LTS). For Windows, enable the "Windows Subsystem for Linux" and then run the commands below.

If you have opted for the virtual machine, you do not have to do the LLVM setup as the pliss/llvm directory has been created for you, and LLVM in release and debug versions has been already built so you can continue with the rift chapter.

Prerequisites

sudo apt-get install cmake g++ git subversion
mkdir pliss
cd pliss
mkdir llvm

LLVM Setup

We now download LLVM and build at least release version of LLVM. The following commands download LLVM into the src and create a directory for the release build. Inside that directory, we run cmake to build LLVM in the release configuration:

To speed up the build, you can use make --jobs NUM where num is number cores. 1.5GB RAM/thread is required, too many cores might run out of memory.

cd llvm
svn co http://llvm.org/svn/llvm-project/llvm/tags/RELEASE_400/final/ src
mkdir release
cd release
cmake -DLLVM_OPTIMIZED_TABLEGEN=1 -DLLVM_ENABLE_RTTI=1 -DLLVM_TARGETS_TO_BUILD="X86" -DCMAKE_BUILD_TYPE="Release" ../src
make
cd ..

Optionally, you can build a debug version. This version takes longer time to link, but produces better errors and helps debugging.

mkdir debug
cd debug
cmake -DLLVM_OPTIMIZED_TABLEGEN=1 -DLLVM_ENABLE_RTTI=1 -DLLVM_TARGETS_TO_BUILD="X86" -DCMAKE_BUILD_TYPE="Debug" --enable-debug-symbols --with-oprofile ../src
make
cd ..

And finally, return back to the pliss directory to install rift;

cd ..

Rift

Now download rift:

git clone https://github.com/PRL-PRG/pliss-rift.git rift
cd rift
mkdir build
cd build
cmake ..
make

When make finishes, you are good for the lecture. As you will be fixing rift throghout the class, you will be able to run it using:

./rift

Possible problems

The directory structure in the pliss folder should be the following:

pliss
    llvm
        src
        release
        debug
    rift

If the directory structure is different, LLVM would not be found by the build script.