#
#BOOST libraries
#

if (WIN32)

#For Visual Studio 2013

if (CMAKE_BUILD_TYPE STREQUAL Debug)
  set (BOOST_DEBUG_OR_RELEASE "debug")
else (CMAKE_BUILD_TYPE STREQUAL Debug)
  set (BOOST_DEBUG_OR_RELEASE "release")
endif (CMAKE_BUILD_TYPE STREQUAL Debug)

if (CMAKE_CL_64)
  set (BOOST_ADDRESS_MODEL 64)
  message (STATUS "Building 64 bit")
else (CMAKE_CL_64)
  set (BOOST_ADDRESS_MODEL 32)
  message (STATUS "Building 32 bit")
endif (CMAKE_CL_64)

#Set up to use generic msvc build environment if a specific
#can not be found below
set (BOOST_TOOLSET msvc)

#Boost should build using the toolchain selected by CMake config
#The versions of MSVC supported by boost are as follows:
#Visual Studio 2003
if (MSVC_VERSION EQUAL 1310)
  set (BOOST_TOOLSET msvc-7.1)
  message (STATUS "Building boost with Visual Studio 2003")
endif (MSVC_VERSION EQUAL 1310)
#Visual Studio 2005
if (MSVC_VERSION EQUAL 1400)
  set (BOOST_TOOLSET msvc-8.0)
  message (STATUS "Building boost with Visual Studio 2005")
endif (MSVC_VERSION EQUAL 1400)
#Visual Studio 2008
if (MSVC_VERSION EQUAL 1500)
  set (BOOST_TOOLSET msvc-9.0)
  message (STATUS "Building boost with Visual Studio 2008")
endif (MSVC_VERSION EQUAL 1500)
#Visual Studio 2010
if (MSVC_VERSION EQUAL 1600)
  set (BOOST_TOOLSET msvc-10.0)
  message (STATUS "Building boost with Visual Studio 2010")
endif (MSVC_VERSION EQUAL 1600)
#Visual Studio 2012
if (MSVC_VERSION EQUAL 1700)
  set (BOOST_TOOLSET msvc-11.0)
  message (STATUS "Building boost with Visual Studio 2012")
endif (MSVC_VERSION EQUAL 1700)
#Visual Studio 2013
if (MSVC_VERSION EQUAL 1800)
  set (BOOST_TOOLSET msvc-12.0)
  message (STATUS "Building boost with Visual Studio 2013")
endif (MSVC_VERSION EQUAL 1800)
#Visual Studio 2015
if (MSVC_VERSION EQUAL 1900)
  set (BOOST_TOOLSET msvc-14.0)
  message (STATUS "Building boost with Visual Studio 2015")
endif (MSVC_VERSION EQUAL 1900)

ExternalProject_Add (
  boost
  PREFIX ${CMAKE_INSTALL_PREFIX}
  BUILD_IN_SOURCE 1 #When running configure, the source directory must be the current directory 
  URL https://sourceforge.net/projects/boost/files/boost/1.63.0/boost_1_63_0.tar.bz2
  URL_MD5 1c837ecd990bb022d07e7aab32b09847
  CONFIGURE_COMMAND ./bootstrap
  BUILD_COMMAND ./b2 --build-dir=<BINARY_DIR> toolset=${BOOST_TOOLSET} link=static address-model=${BOOST_ADDRESS_MODEL} threading=multi variant=${BOOST_DEBUG_OR_RELEASE}
  INSTALL_COMMAND ${CMAKE_COMMAND} -E copy_directory <SOURCE_DIR>/boost <INSTALL_DIR>/include/boost COMMAND ${CMAKE_COMMAND} -E copy_directory <BINARY_DIR>/stage/lib <INSTALL_DIR>/lib
)
endif (WIN32)