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#!/bin/bash -x
set -ev
sudo apt-get install -y llvm-${LLVM_VERSION} llvm-${LLVM_VERSION}-dev
if [ "${LLVM_VERSION}" != "2.9" ]; then
sudo apt-get install -y llvm-${LLVM_VERSION}-tools clang-${LLVM_VERSION}
sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-${LLVM_VERSION} 20
sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-${LLVM_VERSION} 20
else
# Get llvm-gcc. We don't bother installing it
wget http://llvm.org/releases/2.9/llvm-gcc4.2-2.9-x86_64-linux.tar.bz2
tar -xjf llvm-gcc4.2-2.9-x86_64-linux.tar.bz2
mv llvm-gcc4.2-2.9-x86_64-linux llvm-gcc
# Hack to make llvm-gcc capable of building a native executable
OLD_DIR=$(pwd)
cd llvm-gcc/lib/gcc/x86_64-unknown-linux-gnu/4.2.1
ln -s /usr/lib/x86_64-linux-gnu/crt1.o
ln -s /usr/lib/x86_64-linux-gnu/crti.o
ln -s /usr/lib/x86_64-linux-gnu/crtn.o
cd "$OLD_DIR"
# Check it can compile hello world
echo -e "#include <stdio.h> \n int main(int argc, char** argv) { printf(\"Hello World\"); return 0;}" > test.c
export C_INCLUDE_PATH=/usr/include/x86_64-linux-gnu
export CPLUS_INCLUDE_PATH=/usr/include/x86_64-linux-gnu
llvm-gcc/bin/llvm-gcc test.c -o hello_world
./hello_world
fi
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