# This file is used to find gpertools library in CMake script, based on code
# from
#
#   https://github.com/omnisci/omniscidb/blob/master/cmake/Modules/FindGperftools.cmake
#
# which is licensed under the Apache-2.0 License.
#
# Find a Google gperftools installation.
#
# This module finds if Google gperftools is installed and selects a default
# configuration to use.
#
#   find_package(Gperftools COMPONENTS ...)
#
# Valid components are:
#
#   TCMALLOC
#   PROFILER
#   TCMALLOC_MINIMAL
#   TCMALLOC_AND_PROFILER
#
# The following variables control which libraries are found::
#
#   Gperftools_USE_STATIC_LIBS  - Set to ON to force use of static libraries.
#
# The following are set after the configuration is done:
#
# ::
#
#   Gperftools_FOUND            - Set to TRUE if gperftools was found
#   Gperftools_INCLUDE_DIRS     - Include directories
#   Gperftools_LIBRARIES        - Path to the gperftools libraries
#   Gperftools_LIBRARY_DIRS     - Compile time link directories
#   Gperftools_<component>      - Path to specified component
#
#
# Sample usage:
#
# ::
#
#   find_package(Gperftools)
#   if(Gperftools_FOUND)
#     target_link_libraries(<YourTarget> ${Gperftools_LIBRARIES})
#   endif()

if(Gperftools_USE_STATIC_LIBS)
  set(_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
  set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
endif()

macro(_find_library libvar libname)
  find_library(${libvar}
    NAMES ${libname}
    HINTS ENV LD_LIBRARY_PATH
    HINTS ENV DYLD_LIBRARY_PATH
    PATHS
    /usr/lib
    /usr/local/lib
    /usr/local/homebrew/lib
    /opt/local/lib
  )
  if(NOT ${libvar}_NOTFOUND)
    set(${libvar}_FOUND TRUE)
  endif()
endmacro()

_find_library(Gperftools_TCMALLOC tcmalloc)
_find_library(Gperftools_PROFILER profiler)
_find_library(Gperftools_TCMALLOC_MINIMAL tcmalloc_minimal)
_find_library(Gperftools_TCMALLOC_AND_PROFILER tcmalloc_and_profiler)

find_path(Gperftools_INCLUDE_DIR
  NAMES gperftools/heap-profiler.h
  HINTS ${Gperftools_LIBRARY}/../../include
  PATHS
  /usr/include
  /usr/local/include
  /usr/local/homebrew/include
  /opt/local/include
)

get_filename_component(Gperftools_LIBRARY_DIR ${Gperftools_TCMALLOC} DIRECTORY)
# Set standard CMake FindPackage variables if found.
set(Gperftools_LIBRARIES
  ${Gperftools_TCMALLOC}
  ${Gperftools_PROFILER}
)

set(Gperftools_INCLUDE_DIRS ${Gperftools_INCLUDE_DIR})
set(Gperftools_LIBRARY_DIRS ${Gperftools_LIBRARY_DIR})

if(Gperftools_USE_STATIC_LIBS)
  set(CMAKE_FIND_LIBRARY_SUFFIXES ${_CMAKE_FIND_LIBRARY_SUFFIXES})
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
  Gperftools
  REQUIRED_VARS
  Gperftools_INCLUDE_DIR
  HANDLE_COMPONENTS
)