message: Fix detecting arhitecture on raspberry pi
  Detect arhotecture depending on size of void
  Related to
diff: @@ -74,20 +74,16 @@ function(get_os OS)
  endfunction()
  function(get_arch ARCH)
  - if(ARCH_X86)
  + if( CMAKE_SIZEOF_VOID_P MATCHES 8 )
  + # void ptr = 8 byte --> x86_64
  + set(${ARCH} "x86_64" PARENT_SCOPE)
  + elseif( CMAKE_SIZEOF_VOID_P MATCHES 4 )
  + # void ptr = 4 byte --> x86
  set(${ARCH} "x86" PARENT_SCOPE)
  - elseif(ARCH_X64)
  - set(${ARCH} "x64" PARENT_SCOPE)
  - else()
  - if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "i386")
  - set(${ARCH} "x86" PARENT_SCOPE)
  - elseif(${CMAKE_SYSTEM_PROCESSOR} MATCHES "x86_64")
  - set(${ARCH} "x64" PARENT_SCOPE)
  else()
  message(FATAL_ERROR "Unsupported architecture")
  endif()
  - endif()
  -endfunction()
  +endfunction(get_arch ARCH)
  function(get_sdk SDK)
  if(SDK_QT)
  