Boost ExternalProject_Add reference

gistfile1.txt

set(boost_BOOTSTRAP_COMMAND)
if(UNIX)
    set(boost_BOOTSTRAP_COMMAND ./bootstrap.sh)
    set(boost_B2_COMMAND ./b2)
elseif(WIN32)
    set(boost_BOOTSTRAP_COMMAND bootstrap.bat)
    set(boost_B2_COMMAND b2.exe)
endif()

# cmake default is mulththreaded<debug>dll
set(boost_THREADING multi)

set(boost_RUNTIME shared)
if (EXISTS ${CMAKE_MSVC_RUNTIME_LIBRARY})
    string(TOUPPER ${CMAKE_MSVC_RUNTIME_LIBRARY} CMAKE_MSVC_RUNTIME_LIBRARY_UPPER)
    if(${CMAKE_MSVC_RUNTIME_LIBRARY_UPPER} STREQUAL "MULTITHREADED")
        set(boost_RUNTIME static)
    elseif(${CMAKE_MSVC_RUNTIME_LIBRARY_UPPER} STREQUAL "MULTITHREADEDDEBUG")
        set(boost_RUNTIME static)
    elseif(${CMAKE_MSVC_RUNTIME_LIBRARY_UPPER} STREQUAL "MULTITHREADEDDLL")
        set(boost_RUNTIME shared)
    elseif(${CMAKE_MSVC_RUNTIME_LIBRARY_UPPER} STREQUAL "MULTITHREADEDDEBUGDLL")
        set(boost_RUNTIME shared)
    endif()
endif()

string(TOUPPER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_UPPER)
if (${CMAKE_BUILD_TYPE_UPPER} STREQUAL "DEBUG")
    set(boost_VARIANT debug)
else()
    set(boost_VARIANT release)
endif()

set(boost_BUILD ${CMAKE_CURRENT_BINARY_DIR}/boost)
set(boost_INSTALL ${CMAKE_INSTALL_PREFIX})
set(boost_CMAKE_INSTALL ${boost_INSTALL}/cmake)
set(boost_INCLUDE_DIR ${boost_INSTALL}/include)
set(boost_LIB_DIR ${boost_INSTALL}/lib)
set(boost_MSVC_TOOLSET vc142)

ExternalProject_Add(external_boost
    PREFIX boost
	SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/boost"
    BUILD_IN_SOURCE 1
    CONFIGURE_COMMAND ${boost_BOOTSTRAP_COMMAND} ${boost_MSVC_TOOLSET}
    BUILD_COMMAND
	${boost_B2_COMMAND} --prefix=${boost_INSTALL} --cmakedir=${boost_CMAKE_INSTALL} --build-type=minimal --build-dir=${boost_BUILD} --layout=system --without-python --without-mpi --disable-icu toolset=msvc variant=${boost_VARIANT} link=static threading=${boost_THREADING} runtime-link=${boost_RUNTIME} architecture=x86 address-model=64 install
    INSTALL_COMMAND ""
    INSTALL_DIR ${boost_INSTALL} 
)

macro(find_boost)
    set(BOOST_ROOT ${CMAKE_INSTALL_PREFIX})
    set(Boost_USE_STATIC_LIBS ON)
    set(Boost_USE_MULTITHREADED ON)
    find_package(Boost
        COMPONENTS 
        atomic chrono container context contract coroutine date_time exception fiber filesystem graph iostreams locale log log_setup math_c99 math_c99f math_c99l math_tr1 math_tr1f math_tr1l nowide prg_exec_monitor program_options random regex serialization stacktrace_noop stacktrace_windbg stacktrace_windbg_cached system test_exec_monitor thread timer type_erasure unit_test_framework wave wserialization
   )
    if(Boost_FOUND)
        message("Boost found! ${Boost_VERSION_STRING}")
    else()
        message("Boost not found!")
    endif()
endmacro()