# Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

include(ExternalProject)

set(LIBXSMM_SOURCE_DIR ${PADDLE_SOURCE_DIR}/third_party/libxsmm)
set(LIBXSMM_TAG 7cc03b5b342fdbc6b6d990b190671c5dbb8489a2)

set(LIBXSMM_PREFIX_DIR ${THIRD_PARTY_PATH}/libxsmm)
set(LIBXSMM_INSTALL_DIR ${THIRD_PARTY_PATH}/install/libxsmm)
set(LIBXSMM_INCLUDE_DIR
    "${LIBXSMM_INSTALL_DIR}/include"
    CACHE PATH "LIBXSMM include directory." FORCE)
set(LIBXSMM_LIBRARY_DIR
    "${LIBXSMM_INSTALL_DIR}/lib"
    CACHE PATH "LIBXSMM library directory." FORCE)
set(LIBXSMM_LIB "${LIBXSMM_LIBRARY_DIR}/libxsmm.a")
set(LIBXSMMNOBLAS_LIB "${LIBXSMM_LIBRARY_DIR}/libxsmmnoblas.a")

file(GLOB LIBXSMM_SOURCE_FILE_LIST ${LIBXSMM_SOURCE_DIR})
list(LENGTH LIBXSMM_SOURCE_FILE_LIST RES_LEN)
if(RES_LEN EQUAL 0)
  execute_process(
    COMMAND ${GIT_EXECUTABLE} clone -b ${LIBXSMM_TAG}
            "https://github.com/hfp/libxsmm.git" ${LIBXSMM_SOURCE_DIR})
else()
  # check git tag
  execute_process(
    COMMAND ${GIT_EXECUTABLE} describe --abbrev=6 --always --tags
    OUTPUT_VARIABLE VERSION
    OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET
    WORKING_DIRECTORY ${LIBXSMM_SOURCE_DIR})
  if(NOT ${VERSION} STREQUAL ${LIBXSMM_TAG})
    message(
      WARNING "libxsmm version is not ${VERSION}, checkout to ${LIBXSMM_TAG}")
    execute_process(COMMAND ${GIT_EXECUTABLE} checkout ${LIBXSMM_TAG}
                    WORKING_DIRECTORY ${LIBXSMM_SOURCE_DIR})
  endif()
endif()

ExternalProject_Add(
  extern_libxsmm
  ${EXTERNAL_PROJECT_LOG_ARGS}
  SOURCE_DIR ${LIBXSMM_SOURCE_DIR}
  PREFIX ${LIBXSMM_PREFIX_DIR}
  UPDATE_COMMAND ""
  CONFIGURE_COMMAND ""
  BUILD_IN_SOURCE 1
  BUILD_COMMAND $(MAKE) --silent PREFIX=${LIBXSMM_INSTALL_DIR} CXX=g++ CC=gcc
                WARP=0 install
  INSTALL_COMMAND ""
  BUILD_BYPRODUCTS ${LIBXSMM_LIB}
  BUILD_BYPRODUCTS ${LIBXSMMNOBLAS_LIB})
add_library(libxsmm STATIC IMPORTED GLOBAL)
set_property(TARGET libxsmm PROPERTY IMPORTED_LOCATION "${LIBXSMM_LIB}")
set_property(TARGET libxsmm PROPERTY IMPORTED_LOCATION "${LIBXSMMNOBLAS_LIB}")

message(STATUS "Libxsmm library: ${LIBXSMM_LIBS}")
include_directories(${LIBXSMM_INCLUDE_DIR})
add_definitions(-DPADDLE_WITH_LIBXSMM)
add_dependencies(libxsmm extern_libxsmm)