#!/bin/bash -xv
( (
if [ "$(uname -o 2> /dev/null)" = "Cygwin" ]
then
  export CFLAGS=-mno-cygwin
fi

HERE=$(dirname "$0")
HERE=$(cd "$HERE" ; echo $PWD)
cd $HERE/..
LLVM_VERSION=3.1
LLVM_SRC_LINK=http://llvm.org/releases/$LLVM_VERSION/llvm-$LLVM_VERSION.src.tar.gz
CLANG_SRC_LINK=http://llvm.org/releases/$LLVM_VERSION/clang-$LLVM_VERSION.src.tar.gz
COMPILER_RT_SRC_LINK=http://llvm.org/releases/$LLVM_VERSION/compiler-rt-$LLVM_VERSION.src.tar.gz
LLVM_OBJECTS=/tmp/llvm-objects
PROCESSORS=$(cat /proc/cpuinfo 2> /dev/null | grep processor | wc -l)
INSTALL_PREFIX=$PWD/llvm_install
if [ "$PROCESSORS" -eq 0 ]
then
    PROCESSORS=$(system_profiler | grep -i "total number of cores" | sed -e 's/.*: *\([0-9]*\).*/\1/g')
    if [ "$PROCESSORS" -eq 0 ]
    then
       PROCESSORS=1
    fi
fi


rm -rf $INSTALL_PREFIX $LLVM_OBJECTS
rm -rf llvm
mkdir -p llvm/tools/clang
mkdir -p llvm/project/compiler-rt
wget "$LLVM_SRC_LINK" -O - | tar --strip-components=1 -x -z -f - -C llvm || exit
wget "$CLANG_SRC_LINK" -O - | tar --strip-components=1 -x -z -f - -C llvm/tools/clang || exit
wget "$COMPILER_RT_SRC_LINK" -O - | tar --strip-components=1 -x -z -f - -C llvm/project/compiler-rt || exit

mkdir -p $LLVM_OBJECTS
cd $LLVM_OBJECTS || exit
CAML_LLVM_LIB=$(opam config -var lib)/llvm
rm -rf $CAML_LLVM_LIB
mkdir -p $CAML_LLVM_LIB || exit
$HERE/../llvm/configure --prefix=$INSTALL_PREFIX \
                    --enable-docs \
                    llvm_cv_cxx_visibility_inlines_hidden=no \
                    --enable-shared \
                    --enable-debug-runtime \
                    --enable-debug-symbols \
                    --enable-jit \
                    --enable-doxygen \
                    --enable-assertions \
                    --with-ocaml-libdir=$CAML_LLVM_LIB \
                    || exit
make -j$PROCESSORS || exit
make install -k || exit
ln $CAML_LLVM_LIB/META.llvm $CAML_LLVM_LIB/META
rm -rf $LLVM_OBJECTS
) 2>&1 ) | tee llvm.log