#!/bin/bash

set -e

ISPC_VERSION=${1:-1.24.0}

SCRIPT_DIR=$(cd "$(dirname "$BASH_SOURCE")" ; pwd)

pushd ${SCRIPT_DIR}/../..

UE_MODULE_LOCATION=`pwd`

ISPC_SOURCE_LOCATION="$UE_MODULE_LOCATION/ispc-$ISPC_VERSION/"
ISPC_BUILD_LOCATION="$ISPC_SOURCE_LOCATION/build/"
ISPC_INSTALL_LOCATION="$UE_MODULE_LOCATION/ispc/"
LLVM_INSTALL_LOCATION="$UE_MODULE_LOCATION/llvm/"

CORES=$(getconf _NPROCESSORS_ONLN)

export PATH=$PATH:"$LLVM_INSTALL_LOCATION/bin":"$ISPC_INSTALL_LOCATION/bin"

rm -rf $ISPC_INSTALL_LOCATION
rm -rf $ISPC_BUILD_LOCATION

mkdir $ISPC_INSTALL_LOCATION
mkdir $ISPC_BUILD_LOCATION

CMAKE_ARGS=(
    -DCMAKE_INSTALL_PREFIX="$ISPC_INSTALL_LOCATION"
    -DCMAKE_BUILD_TYPE=Release
	-DARM_ENABLED=ON
    -DWASM_ENABLED=OFF
    -DISPC_INCLUDE_EXAMPLES=OFF
    -DISPC_INCLUDE_DPCPP_EXAMPLES=OFF
    -DISPC_INCLUDE_TESTS=OFF
    -DISPC_INCLUDE_BENCHMARKS=OFF
    -DISPC_INCLUDE_UTILS=OFF
    -DISPC_PREPARE_PACKAGE=OFF
    -DISPC_CROSS=ON
    -DISPC_WINDOWS_TARGET=OFF
    -DISPC_LINUX_TARGET=ON
    -DISPC_FREEBSD_TARGET=ON
	-DISPC_MACOS_TARGET=OFF
    -DISPC_IOS_TARGET=OFF
    -DISPC_ANDROID_TARGET=ON
    -DISPC_PS_TARGET=OFF
    -DISPC_STATIC_STDCXX_LINK=ON
)

pushd $ISPC_BUILD_LOCATION

echo Configuring build for ISPC version $ISPC_VERSION...
cmake -G "Unix Makefiles" $ISPC_SOURCE_LOCATION "${CMAKE_ARGS[@]}"

echo Building ISPC for Release...
cmake --build . --config Release --parallel ${CORES}

echo Installing ISPC for Release...
cmake --install . --config Release

popd

#p4 edit "$UE_MODULE_LOCATION/bin/Linux/ispc"
#cp "$ISPC_INSTALL_LOCATION/bin/ispc" "$UE_MODULE_LOCATION/bin/Linux/ispc"

popd

echo Done.