# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
#
# 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

# Tries to find Gperftools.
#
# Usage of this module as follows:
#
#     find_package(Gperftools)
#
# Variables used by this module, they can change the default behaviour and need
# to be set before calling find_package:
#
#  Gperftools_ROOT_DIR  Set this variable to the root installation of
#                       Gperftools if the module has problems finding
#                       the proper installation path.
#
# Variables defined by this module:
#
#  GPERFTOOLS_FOUND              System has Gperftools libs/headers
#  GPERFTOOLS_LIBRARIES          The Gperftools libraries (tcmalloc & profiler)
#  GPERFTOOLS_INCLUDE_DIR        The location of Gperftools headers

find_library(GPERFTOOLS_TCMALLOC
  NAMES tcmalloc
  HINTS ${Gperftools_ROOT_DIR}/lib)

find_library(GPERFTOOLS_PROFILER
  NAMES profiler
  HINTS ${Gperftools_ROOT_DIR}/lib)

find_library(GPERFTOOLS_TCMALLOC_AND_PROFILER
  NAMES tcmalloc_and_profiler
  HINTS ${Gperftools_ROOT_DIR}/lib)

find_path(GPERFTOOLS_INCLUDE_DIR
  NAMES gperftools/heap-profiler.h
  HINTS ${Gperftools_ROOT_DIR}/include)

set(GPERFTOOLS_LIBRARIES ${GPERFTOOLS_TCMALLOC_AND_PROFILER})

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
  Gperftools
  DEFAULT_MSG
  GPERFTOOLS_LIBRARIES
  GPERFTOOLS_INCLUDE_DIR)

mark_as_advanced(
  Gperftools_ROOT_DIR
  GPERFTOOLS_TCMALLOC
  GPERFTOOLS_PROFILER
  GPERFTOOLS_TCMALLOC_AND_PROFILER
  GPERFTOOLS_LIBRARIES
  GPERFTOOLS_INCLUDE_DIR)

# create IMPORTED targets
if (Gperftools_FOUND AND NOT TARGET gperftools::tcmalloc)
  add_library(gperftools::tcmalloc UNKNOWN IMPORTED)
  set_target_properties(gperftools::tcmalloc PROPERTIES
    IMPORTED_LOCATION ${GPERFTOOLS_TCMALLOC}
    INTERFACE_INCLUDE_DIRECTORIES "${GPERFTOOLS_INCLUDE_DIR}")
  add_library(gperftools::profiler UNKNOWN IMPORTED)
  set_target_properties(gperftools::profiler PROPERTIES
    IMPORTED_LOCATION ${GPERFTOOLS_PROFILER}
    INTERFACE_INCLUDE_DIRECTORIES "${GPERFTOOLS_INCLUDE_DIR}")
endif()