x86 (i386) and AMD 64 (x64)
     -  OSX (both powerPC and x86).
     -  Cygwin, msys and mingw on x86
  There is an additional zip file for building with MS Visual Studio.

  Libraries, executables and prototypes are easily made, as described below.

  When you extract from the archive, all files are put in a
  subdirectory 'leptonica-1.85.0'.  In that directory you will
  find a src directory containing the source files for the library,
  and a prog directory containing source files for various
  testing a