title: how to compile Leptonica library for windows x64 bit using VS2010?
body: <p>I can build Leptonica libraries(DLL) for 32-bit windows using VS2010 by the help  of <a href="http://www.leptonica.com/vs2008doc/building-liblept.html" rel="nofollow">http://www.leptonica.com/vs2008doc/building-liblept.html</a> .
  But when I change the Target into x64, I got below errors. How can I resolve this? Is it possible to compile the 32-bit source files in 64 bit?</p>
  
  <p><em>2>tiffio.obj : error LNK2019: unresolved external symbol TIFFReadRGBAImageOriented referenced in function pixReadFromTiffStream
  2>tiffio.obj : error LNK2019: unresolved external symbol TIFFReadScanline referenced in function pixReadFromTiffStream
  2>tiffio.obj : error LNK2019: unresolved external symbol TIFFScanlineSize referenced in function pixReadFromTiffStream
  2>tiffio.obj : error LNK2019: unresolved external symbol TIFFGetField referenced in function pixReadFromTiffStream</em></p>