# Copyright (c) 2017 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(MKLDNN_PROJECT "extern_mkldnn")
set(MKLDNN_PREFIX_DIR ${THIRD_PARTY_PATH}/mkldnn)
set(MKLDNN_INSTALL_DIR ${THIRD_PARTY_PATH}/install/mkldnn)
set(MKLDNN_INC_DIR
    "${MKLDNN_INSTALL_DIR}/include"
    CACHE PATH "mkldnn include directory." FORCE)
set(MKLDNN_REPOSITORY ${GIT_URL}/oneapi-src/oneDNN.git)
set(MKLDNN_TAG 9b186765dded79066e0cd9c17eb70b680b76fb8e)

# Introduce variables:
# * CMAKE_INSTALL_LIBDIR
include(GNUInstallDirs)
set(LIBDIR "lib")
if(CMAKE_INSTALL_LIBDIR MATCHES ".*lib64$")
  set(LIBDIR "lib64")
endif()

message(STATUS "Set ${MKLDNN_INSTALL_DIR}/${LIBDIR} to runtime path")
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_RPATH}"
                        "${MKLDNN_INSTALL_DIR}/${LIBDIR}")

include_directories(${MKLDNN_INC_DIR}
)# For MKLDNN code to include internal headers.

if(NOT WIN32)
  set(MKLDNN_FLAG
      "-Wno-error=strict-overflow -Wno-error=unused-result -Wno-error=array-bounds"
  )
  set(MKLDNN_FLAG "${MKLDNN_FLAG} -Wno-unused-result -Wno-unused-value")
  set(MKLDNN_CFLAG "${CMAKE_C_FLAGS} ${MKLDNN_FLAG}")
  set(MKLDNN_CXXFLAG "${CMAKE_CXX_FLAGS} ${MKLDNN_FLAG}")
  set(MKLDNN_CXXFLAG_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
  set(MKLDNN_CFLAG_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
  set(MKLDNN_LIB
      "${MKLDNN_INSTALL_DIR}/${LIBDIR}/libdnnl.so"
      CACHE FILEPATH "mkldnn library." FORCE)
else()
  set(MKLDNN_CXXFLAG "${CMAKE_CXX_FLAGS} /EHsc")
  set(MKLDNN_CFLAG "${CMAKE_C_FLAGS}")
  string(REPLACE "/O2 " "" MKLDNN_CFLAG_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
  string(REPLACE "/O2 " "" MKLDNN_CXXFLAG_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
  set(MKLDNN_LIB
      "${MKLDNN_INSTALL_DIR}/bin/mkldnn.lib"
      CACHE FILEPATH "mkldnn library." FORCE)
endif()

if(LINUX)
  set(BUILD_BYPRODUCTS_ARGS ${MKLDNN_LIB})
else()
  set(BUILD_BYPRODUCTS_ARGS "")
endif()

ExternalProject_Add(
  ${MKLDNN_PROJECT}
  ${EXTERNAL_PROJECT_LOG_ARGS} ${SHALLOW_CLONE}
  GIT_REPOSITORY ${MKLDNN_REPOSITORY}
  GIT_TAG ${MKLDNN_TAG}
  DEPENDS ${MKLDNN_DEPENDS}
  PREFIX ${MKLDNN_PREFIX_DIR}
  UPDATE_COMMAND ""
  #BUILD_ALWAYS        1
  CMAKE_ARGS -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
             -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
             -DCMAKE_CXX_FLAGS=${MKLDNN_CXXFLAG}
             -DCMAKE_CXX_FLAGS_RELEASE=${MKLDNN_CXXFLAG_RELEASE}
             -DCMAKE_CXX_FLAGS_DEBUG=${CMAKE_CXX_FLAGS_DEBUG}
             -DCMAKE_C_FLAGS=${MKLDNN_CFLAG}
             -DCMAKE_C_FLAGS_DEBUG=${CMAKE_C_FLAGS_DEBUG}
             -DCMAKE_C_FLAGS_RELEASE=${MKLDNN_CFLAG_RELEASE}
             -DCMAKE_INSTALL_PREFIX=${MKLDNN_INSTALL_DIR}
             -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
             -DCMAKE_POSITION_INDEPENDENT_CODE=ON
             -DDNNL_BUILD_TESTS=OFF
             -DDNNL_BUILD_EXAMPLES=OFF
  CMAKE_CACHE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${MKLDNN_INSTALL_DIR}
  BUILD_BYPRODUCTS ${BUILD_BYPRODUCTS_ARGS})

message(STATUS "MKLDNN library: ${MKLDNN_LIB}")
add_definitions(-DPADDLE_WITH_MKLDNN)
# copy the real so.0 lib to install dir
# it can be directly contained in wheel or capi
if(WIN32)
  set(MKLDNN_SHARED_LIB ${MKLDNN_INSTALL_DIR}/bin/mkldnn.dll)

  file(TO_NATIVE_PATH ${MKLDNN_INSTALL_DIR} NATIVE_MKLDNN_INSTALL_DIR)
  file(TO_NATIVE_PATH ${MKLDNN_SHARED_LIB} NATIVE_MKLDNN_SHARED_LIB)

  add_custom_command(
    OUTPUT ${MKLDNN_LIB}
    COMMAND (copy ${NATIVE_MKLDNN_INSTALL_DIR}\\bin\\dnnl.dll
             ${NATIVE_MKLDNN_SHARED_LIB} /Y)
    COMMAND dumpbin /exports ${MKLDNN_INSTALL_DIR}/bin/mkldnn.dll >
            ${MKLDNN_INSTALL_DIR}/bin/exports.txt
    COMMAND echo LIBRARY mkldnn > ${MKLDNN_INSTALL_DIR}/bin/mkldnn.def
    COMMAND echo EXPORTS >> ${MKLDNN_INSTALL_DIR}/bin/mkldnn.def
    COMMAND
      echo off && (for
                   /f
                   "skip=19 tokens=4"
                   %A
                   in
                   (${MKLDNN_INSTALL_DIR}/bin/exports.txt)
                   do
                   echo
                   %A
                   >>
                   ${MKLDNN_INSTALL_DIR}/bin/mkldnn.def) && echo on
    COMMAND lib /def:${MKLDNN_INSTALL_DIR}/bin/mkldnn.def /out:${MKLDNN_LIB}
            /machine:x64
    COMMENT "Generate mkldnn.lib manually--->"
    DEPENDS ${MKLDNN_PROJECT}
    VERBATIM)
  add_custom_target(mkldnn_cmd ALL DEPENDS ${MKLDNN_LIB})
else()
  set(MKLDNN_SHARED_LIB ${MKLDNN_INSTALL_DIR}/libmkldnn.so.0)
  set(MKLDNN_SHARED_LIB_1 ${MKLDNN_INSTALL_DIR}/libdnnl.so.1)
  set(MKLDNN_SHARED_LIB_2 ${MKLDNN_INSTALL_DIR}/libdnnl.so.2)
  add_custom_command(
    OUTPUT ${MKLDNN_SHARED_LIB_2}
    COMMAND ${CMAKE_COMMAND} -E copy ${MKLDNN_LIB} ${MKLDNN_SHARED_LIB}
    COMMAND ${CMAKE_COMMAND} -E copy ${MKLDNN_LIB} ${MKLDNN_SHARED_LIB_1}
    COMMAND ${CMAKE_COMMAND} -E copy ${MKLDNN_LIB} ${MKLDNN_SHARED_LIB_2}
    DEPENDS ${MKLDNN_PROJECT})
  add_custom_target(mkldnn_cmd ALL DEPENDS ${MKLDNN_SHARED_LIB_2})
endif()

# generate a static dummy target to track mkldnn dependencies
# for cc_library(xxx SRCS xxx.c DEPS mkldnn)
generate_dummy_static_lib(LIB_NAME "mkldnn" GENERATOR "mkldnn.cmake")

target_link_libraries(mkldnn ${MKLDNN_LIB} ${MKLML_IOMP_LIB})
add_dependencies(mkldnn ${MKLDNN_PROJECT} mkldnn_cmd)