#-----------------------------------------------------------------------------
# Update CMake module path
#------------------------------------------------------------------------------
set(CMAKE_MODULE_PATH
  ${${PROJECT_NAME}_SOURCE_DIR}/CMake
  ${${PROJECT_NAME}_BINARY_DIR}/CMake
  ${CMAKE_MODULE_PATH}
  )

#-----------------------------------------------------------------------------
# Sanity checks
#------------------------------------------------------------------------------
include(PreventInSourceBuilds)
include(PreventInBuildInstalls)
#include(itkCheckSourceTree)

include(CMakeDependentOption)
#-----------------------------------------------------------------------------
# Build option(s)
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
option(ANTS_BUILD_WITH_CCACHE "Build ${LOCAL_PROJECT_NAME} using ccache if available." ON)
mark_as_advanced(ANTS_BUILD_WITH_CCACHE)
if(ANTS_BUILD_WITH_CCACHE)
  include(CCache)
endif()

option(BUILD_SHARED_LIBS "Build ITK with shared libraries." OFF)
set(ANTS_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})

option(ITK_USE_SYSTEM_PNG "Use system png library if found" OFF)
mark_as_advanced(ITK_USE_SYSTEM_PNG)

######################################################################################################
# BA - add this stuff to help installation of ANTsR
# set(CMAKE_SKIP_BUILD_RPATH  FALSE)
# set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
# set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
# set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
# list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${CMAKE_INSTALL_PREFIX}/lib" isSystemDir)
# if("${isSystemDir}" STREQUAL "-1")
#   set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/lib")
# endif()
#####################################################################################################

set(USE_ITKv5 ON)
set(ITK_VERSION_MAJOR 5 CACHE STRING "Choose the expected ITK major version to build ANTS only version 5 allowed.")
# Set the possible values of ITK major version for cmake-gui
set_property(CACHE ITK_VERSION_MAJOR PROPERTY STRINGS "5")
set(expected_ITK_VERSION_MAJOR ${ITK_VERSION_MAJOR})
if(${ITK_VERSION_MAJOR} VERSION_LESS ${expected_ITK_VERSION_MAJOR})
  # Note: Since ITKv3 doesn't include a ITKConfigVersion.cmake file, let's check the version
  #       explicitly instead of passing the version as an argument to find_package() command.
  message(FATAL_ERROR "Could not find a configuration file for package \"ITK\" that is compatible "
                      "with requested version \"${expected_ITK_VERSION_MAJOR}\".\n"
                      "The following configuration files were considered but not accepted:\n"
                      "  ${ITK_CONFIG}, version: ${ITK_VERSION_MAJOR}.${ITK_VERSION_MINOR}.${ITK_VERSION_PATCH}\n")
endif()

if(${ITK_VERSION_MAJOR} STREQUAL "3")
  message(FATAL_ERROR "ITKv3 is no longer supported")
endif()


#-----------------------------------------------------------------------------
# Set a default build type if none was specified
if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
  message(STATUS "Setting build type to 'Release' as none was specified.")
  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
  # Set the possible values of build type for cmake-gui
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
endif()

#-----------------------------------------------------------------------------
# CMake Function(s) and Macro(s)
#-----------------------------------------------------------------------------
# With CMake 2.8.9 or later, the UPDATE_COMMAND is required for updates to occur.
# For earlier versions, we nullify the update state to prevent updates and
# undesirable rebuild.
if(CMAKE_VERSION VERSION_LESS 2.8.9)
  set(cmakeversion_external_update UPDATE_COMMAND "")
else()
  set(cmakeversion_external_update LOG_UPDATE 1)
endif()

if(CMAKE_VERSION VERSION_LESS 2.8.3)
  include(Pre283CMakeParseArguments)
else()
  include(CMakeParseArguments)
endif()

#-----------------------------------------------------------------------------
# Platform check
#-----------------------------------------------------------------------------
set(PLATFORM_CHECK true)
if(PLATFORM_CHECK)
  # See CMake/Modules/Platform/Darwin.cmake)
  #   6.x == Mac OSX 10.2 (Jaguar)
  #   7.x == Mac OSX 10.3 (Panther)
  #   8.x == Mac OSX 10.4 (Tiger)
  #   9.x == Mac OSX 10.5 (Leopard)
  #  10.x == Mac OSX 10.6 (Snow Leopard)
  if (DARWIN_MAJOR_VERSION LESS "9")
    message(FATAL_ERROR "Only Mac OSX >= 10.5 are supported !")
  endif()
endif()

#-------------------------------------------------------------------------
# Augment compiler flags
#-------------------------------------------------------------------------
include(ITKSetStandardCompilerFlags)
if(ITK_LEGACY_REMOVE)
  if(CMAKE_BUILD_TYPE STREQUAL "Debug")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${C_DEBUG_DESIRED_FLAGS} " )
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_DEBUG_DESIRED_FLAGS} " )
  else() # Release, or anything else
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${C_RELEASE_DESIRED_FLAGS} " )
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX_RELEASE_DESIRED_FLAGS} " )
  endif()
endif()

if(BUILD_SHARED_LIBS)
if(NOT CMAKE_POSITION_INDEPENDENT_CODE)
  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
endif()
endif()

#-------------------------------------------------------------------------
# Define install dirs for different platforms
#-------------------------------------------------------------------------
include(GNUInstallDirs)