#!/bin/bash
set -e

# Building LLVM on OSX CMake setup script
#
# Required:
#   - clang by Xcode6 or later
#   - cmake
#   - ninja
#
# Usage:
#   build-llvm.bash <LLVM SOURCES ROOT> <CMAKE GENERATORS> <PYTHON VERSION> [DIST_DIR]
#
#   CMake Generators: Unix Makefiles, Ninja, Xcode (Recommend is Ninja)
#
#   Python Version: 2 or 3
#     - for LLDB dylib
#
# Tested version:
#   Apple LLVM version 7.3.0 (clang-703.0.28)
#   Target: x86_64-apple-darwin15.4.0
#
#
# References:
#   - llvm 3.8 currently requires Xcode 7(OS X 10.10 or 10.11) Build the new tsan support in compiler-rt or using
#     - -DLLVM_BUILD_EXTERNAL_COMPILER_RT:BOOL=ON
#     - Ref: https://groups.google.com/forum/m/#!topic/llvm-dev/Uxb1o83qTMI
#   - Building with Clan Address Sanitizer(ASan)
#     - https://trac.webkit.org/wiki/ASanWebKit
#   - Not build llvm-dsymutil
#     - When LLVM_ENABLE_LTO, link for llvm-dsymutil too slow...
#     - github.com/apple/apple-llvm instead of
#     - -DLLVM_TOOL_DSYMUTIL_BUILD:BOOL=OFF


# define install directory
if [[ $4 ]]; then
  DST_DIR=$4
else
  DST_DIR=/opt/llvm
fi

# define Python Frameworks path
if [[ $3 != "System" ]]; then
  PYTHON_CONFIG=python$3-config
  PYTHON_EXECUTABLE=$(which python"$3")
else
  PYTHON_CONFIG=/usr/bin/python-config
  PYTHON_EXECUTABLE=/usr/bin/python
fi
PYTHON_INCLUDE_DIR=$(find $("$PYTHON_CONFIG" --prefix)/include -name 'python*' -type d -maxdepth 1)
PYTHON_LIBRARY=$(find $("$PYTHON_CONFIG" --prefix)/lib -name 'libpython*' -maxdepth 1)

ENVIRONMENT_VARIABLE="\
\$SRC_DIR:			$1
    \$DST_DIR:			$DST_DIR
    \$PYTHON_EXECUTABLE:		$PYTHON_EXECUTABLE
    \$PYTHON_INCLUDE_DIR:	$PYTHON_INCLUDE_DIR
    \$PYTHON_LIBRARY:		$PYTHON_LIBRARY"

# Usage
usage() {
  USAGE_CMAKE_GENERATORS="\
Unix Makefiles
    Ninja
    Xcode
    CodeBlocks - Ninja
    CodeBlocks - Unix Makefiles
    CodeLite - Ninja
    CodeLite - Unix Makefiles
    Eclipse CDT4 - Ninja
    Eclipse CDT4 - Unix Makefiles
    KDevelop3
    KDevelop3 - Unix Makefiles
    Kate - Ninja
    Kate - Unix Makefiles
    Sublime Text 2 - Ninja
    Sublime Text 2 - Unix Makefiles"
  USAGE_PYTHON_VERSION="\
2
    3
    Sytem"

  echo "error: No build tool as arguments"
  echo ""
  echo "Usage: $0 <LLVM SOURCES ROOT> <CMake Generators> <Python Version> [\$DIST_DIR]"
  echo ""
  echo "CMake Generators"
  echo "    $USAGE_CMAKE_GENERATORS"
  echo ""
  echo "Python Version"
  echo "    $USAGE_PYTHON_VERSION"
  echo ""
  echo "Environment variable:"
  echo "    $ENVIRONMENT_VARIABLE"
  exit 1
}

# Check len(args)
if [[ ! -n $3 ]]; then
  usage
fi

# define dependencies packages
PYTHON="\
  -DPYTHON_EXECUTABLE=$PYTHON_EXECUTABLE \
  -DPYTHON_INCLUDE_DIR=$PYTHON_INCLUDE_DIR \
  -DPYTHON_LIBRARY=$PYTHON_LIBRARY"
LIBXML2="\
  -DLIBXML2_INCLUDE_DIR=/usr/local/opt/libxml2/include/libxml2 \
  -DLIBXML2_LIBRARIES=/usr/local/opt/libxml2/lib/libxml2.dylib \
  -DLIBXML2_XMLLINT_EXECUTABLE=/usr/local/opt/libxml2/bin/xmllint"
LIBFFI="\
  -DFFI_INCLUDE_DIR=/usr/local/opt/libffi/lib/libffi-3.0.13/include \
  -DFFI_LIBRARY_DIR=/usr/local/opt/libffi/lib/libffi.dylib"


# Warning for have not '*build*' in current dir name
if ! [[ $(readlink -f .) == *build* ]]; then
  echo "Current dir needs build* name"
  exit 1
fi

# if hash ccache 2>/dev/null; then
#   export CC="ccache $CC"
#   export CXX="ccache $CXX"
# fi

echo "CMake Generators"
echo "    $2"
echo "Python Version"
echo "    $3"
echo "Environment variable:"
echo "    $ENVIRONMENT_VARIABLE"
echo ""

command cmake $1 -G $2 \
  \
  -DBUILD_SHARED_LIBS:BOOL=OFF \
  \
  -DCMAKE_ASM_FLAGS:STRING='-march=native' \
  -DCMAKE_BUILD_TYPE:STRING=Release \
  -DCMAKE_CXX_FLAGS:STRING='-march=native' \
  -DCMAKE_C_FLAGS:STRING='-march=native' \
  -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=ON \
  -DCMAKE_FIND_FRAMEWORK=LAST \
  -DCMAKE_INSTALL_PREFIX:PATH=$DST_DIR \
  -DCMAKE_OSX_ARCHITECTURES:STRING=x86_64 \
  -DCMAKE_OSX_DEPLOYMENT_TARGET:STRING=10.11 \
  -DCMAKE_OSX_SYSROOT:STRING="$(xcrun --show-sdk-path)" \
  -DCMAKE_SKIP_INSTALL_RPATH:BOOL=NO \
  -DCMAKE_SKIP_RPATH:BOOL=NO \
  \
  -DCLANG_DEFAULT_CXX_STDLIB:STRING=libc++ \
  -DCLANG_INCLUDE_DOCS:BOOL=ON \
  -DCLANG_INCLUDE_TESTS:BOOL=ON \
  \
  -DCURSES_CURSES_LIBRARY:FILEPATH=/usr/local/lib/libcurses.dylib \
  -DCURSES_FORM_LIBRARY:FILEPATH=/usr/local/lib/libform.dylib \
  -DCURSES_INCLUDE_PATH:PATH=/usr/local/include \
  -DCURSES_NCURSES_LIBRARY:FILEPATH=/usr/local/lib/libncurses.dylib \
  -DCURSES_PANEL_LIBRARY:FILEPATH=/usr/local/lib/libpanel.dylib \
  \
  -DLIBCLANG_BUILD_STATIC:BOOL=ON \
  -DLIBCXX_ABI_UNSTABLE:BOOL=ON \
  -DLIBCXX_CONFIGURE_IDE:BOOL=ON \
  -DLIBCXXABI_ENABLE_ASSERTIONS:BOOL=OFF \
  -DLIBCXXABI_SYSROOT:STRING="$(xcrun --show-sdk-path)" \
  -DLIBCXXABI_USE_LLVM_UNWINDER:BOOL=OFF \
  \
  -DLIBCXX_ENABLE_ASSERTIONS:BOOL=OFF \
  -DLIBCXX_OVERRIDE_DARWIN_INSTALL:BOOL=ON \
  -DLIBCXX_SYSROOT:STRING="$(xcrun --show-sdk-path)" \
  \
  -DLIBOMP_OSX_ARCHITECTURES:STRING=x86_64 \
  -DLIBOMP_USE_HWLOC:BOOL=ON \
  \
  -DLLDB_EXPORT_ALL_SYMBOLS:BOOL=ON \
  \
  -DLLVM_BUILD_EXTERNAL_COMPILER_RT:BOOL=ON \
  -DLLVM_BUILD_GLOBAL_ISEL:BOOL=ON \
  -DLLVM_BUILD_LLVM_C_DYLIB:BOOL=ON \
  -DLLVM_BUILD_LLVM_DYLIB:BOOL=ON \
  -DLLVM_CREATE_XCODE_TOOLCHAIN:BOOL=OFF \
  -DLLVM_ENABLE_ASSERTIONS:BOOL=OFF \
  -DLLVM_ENABLE_CXX1Y:BOOL=ON \
  -DLLVM_ENABLE_FFI:BOOL=OFF \
  -DLLVM_ENABLE_LIBCXX:BOOL=ON \
  -DLLVM_ENABLE_LIBCXXABI:BOOL=ON \
  -DLLVM_ENABLE_SPHINX:BOOL=OFF \
  -DLLVM_EXTERNALIZE_DEBUGINFO:BOOL=OFF \
  -DLLVM_INCLUDE_DOCS:BOOL=ON \
  -DLLVM_LINK_LLVM_DYLIB:BOOL=OFF \
  -DLLVM_OPTIMIZED_TABLEGEN:BOOL=ON \
  -DLLVM_PARALLEL_COMPILE_JOBS:STRING=8 \
  -DLLVM_PARALLEL_LINK_JOBS:STRING=8 \
  -DLLVM_TARGET_ARCH:STRING=host \
  -DLLVM_TARGETS_TO_BUILD:STRING=X86 \
  -DLLVM_TOOL_DSYMUTIL_BUILD:BOOL=ON \
  -DLLVM_USE_SPLIT_DWARF:BOOL=OFF \
  \
  -DPOLLY_ENABLE_GPGPU_CODEGEN:BOOL=ON \
  \
  -Wno-dev \
  \
  $(echo $PYTHON) \
  $(echo $LIBXML2) \
  \
  -DLLVM_ENABLE_LTO:STRING=OFF \
  -DLLVM_TOOL_LTO_BUILD:BOOL=OFF
  # -DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD:STRING= \
  # $(echo $LIBFFI) \
  # \
  # -DC_INCLUDE_DIRS:STRING="$(xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/include:/usr/include" \


# Disable sanitizer (workaround)
#   - clang: error: unsupported argument 'all' to option 'fno-sanitize='
if hash ag 2>/dev/null; then
  ag -l "  -fno-sanitize=all" | xargs sed -i 's/  -fno-sanitize=all//'
elif hash grep 2>/dev/null; then
  grep -l "  -fno-sanitize=all" $PWD | xargs sed -i 's/  -fno-sanitize=all//'
else
  echo "Disable sanitizer required "
  exit 1
fi