configure

#!/usr/bin/sh

build_tool="make"

call_dir=`pwd`

if [ $# -ne 3 ]; then
  echo -e "Wrong number of arguments. Usage:"
  echo -e "1) ./$(basename "$0") <llvm_src_dir> <llvm_obj_dir> <llvm_bin_dir>"
  echo -e "   <llvm_src_dir>: The root directory of LLVM source code."
  echo -e "   <llvm_obj_dir>: The directory that LLVM is built."
  echo -e "                   Could be the same as <llvm_src_dir>."
  echo -e "   <llvm_bin_dir>: The directory that LLVM is installed.\n"
  echo -e "2) ./$(basename "$0") \$(cat llvm_dirs)"
  echo -e "   The \"llvm_dirs\" file is generated by the \"download_llvm\" script."
  exit 1
fi

command -v cmake >/dev/null 2>&1 || {
  echo -e "cmake is required to run this script. Aborting..." >&2;
  echo -e "hint: apt-get install cmake\n" >&2;
  exit 1;
}

command -v g++ >/dev/null 2>&1 || {
  echo -e "g++ is required to build this project. Aborting..." >&2;
  echo -e "hint: apt-get install build-essential\n" >&2;
  exit 1;
}

if [ -d "$1" ]; then
  llvm_src_dir="$(cd "$1" && pwd)"
else
  echo -e "Directory $1 does not exist."
  exit 1
fi

if [ -d "$2" ]; then
  llvm_obj_dir="$(cd "$2" && pwd)"
else
  echo -e "Directory $2 does not exist."
  exit 1
fi

if [ -d "$3" ]; then
  llvm_bin_dir="$(cd "$3" && pwd)"
else
  echo -e "Directory $3 does not exist."
  exit 1
fi

# Find the absolute path of the project
proj_root_dir="$(cd "$(dirname "$0")" && pwd)"

# Include the projects directory in the right CMakeFiles.txt file
# under clang's project tree, in order to be able to build it.
makelist="${llvm_src_dir}/tools/clang/tools/extra/CMakeLists.txt"
if [ ! -e $makelist ]; then
  echo -e "Clang and clang-extra-tools are required to build this project."
  exit 1
fi
if ! grep -q ${proj_root_dir} ${makelist}; then
  echo -e "\nadd_subdirectory(${proj_root_dir} ${proj_root_dir})\n" >> ${makelist}
fi

cd ${llvm_obj_dir}
if [ $build_tool = "ninja" ]; then
    cmake -G Ninja ${llvm_src_dir} -DCMAKE_INSTALL_PREFIX=${llvm_bin_dir} -DLLVM_TARGETS_TO_BUILD=host
else
    cmake ${llvm_src_dir} -DCMAKE_INSTALL_PREFIX=${llvm_bin_dir} -DLLVM_TARGETS_TO_BUILD=host
fi

# Create a symlink to the executable for convenience.
if [ -h ${proj_root_dir}/vygraph ]; then
  echo -e "Cannot create link ${proj_root_dir}/vygraph. File already exists."
else
  cd ${proj_root_dir}
  ln -s ${llvm_obj_dir}/bin/vygraph vygraph
fi

cd ${call_dir}