macro(pre_build TARGET_NAME)
  add_custom_target( ${TARGET_NAME}_PRE_BUILD ALL )

  add_custom_command(
    TARGET ${TARGET_NAME}_PRE_BUILD
    ${ARGN}
    PRE_BUILD
    COMMENT "${TARGET_NAME}_PRE_BUILD ..."
    )

  add_custom_target( ${TARGET_NAME}_CORE_PRE_BUILD )
  add_dependencies( ${TARGET_NAME}_PRE_BUILD ${TARGET_NAME}_CORE_PRE_BUILD )
endmacro()

#cmake has some strange defaults, this should help us a lot
#Please use them everywhere

#WINDOWS 	= 	Windows Desktop
#WINRT 		= 	Windows RT
#WP8 	  	= 	Windows Phone 8
#ANDROID    =	ANDROID
#IOS		=	IOS
#MACOSX		=	MAC OSX

if (${CMAKE_SYSTEM_NAME} MATCHES "Windows")
  if(WINRT)
    set(SYSTEM_STRING "Windows RT")
  elseif(WP8)
    set(SYSTEM_STRING "Windows Phone 8")
  else()
    set(WINDOWS TRUE)
    set(SYSTEM_STRING "Windows Desktop")
  endif()
elseif (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
  if(ANDROID)
    set(SYSTEM_STRING "Android")
  else()
    set(LINUX TRUE)
    set(SYSTEM_STRING "Linux")
  endif()
elseif (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
  if(IOS)
    set(SYSTEM_STRING "IOS")
  else()
    set(MACOSX TRUE)
    set(SYSTEM_STRING "Mac OSX")
  endif()
endif()

if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
  set(COMPILER_STRING ${CMAKE_CXX_COMPILER_ID})
  set(CLANG TRUE)
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
  if(MINGW)
    set(COMPILER_STRING "Mingw GCC")
  else()
    set(COMPILER_STRING "GCC")
  endif()
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
  set(COMPILER_STRING "${CMAKE_CXX_COMPILER_ID} C++")
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
  set(COMPILER_STRING "Visual Studio C++")
endif()

if(CMAKE_CROSSCOMPILING)
  set(BUILDING_STRING "It appears you are cross compiling for ${SYSTEM_STRING} with ${COMPILER_STRING}")
else()
  set(BUILDING_STRING "It appears you are builing natively for ${SYSTEM_STRING} with ${COMPILER_STRING}")
endif()