Simple compiled plugins using that gimptool-2.0 command a lot easier in linux than Windows, even then, old code liable to produce errors.
As far as I know for Windows, you need a whole load of extras, a C compiler 'mingw' + a load of library files.
Not many members here who compile for Windows. My advice: Post again on http://www.gimpchat.com where you might get a suitable answer. I would also include a link to that code IntensityAdj.c I have had a search and can not find that as a file.
Some not-too-old examples of questions from gimpchat
http://gimpchat.com/viewtopic.php?f=8&t=14393 http://gimpchat.com/viewtopic.php?f=9&t=13827 and their problems.
As far as I know for Windows, you need a whole load of extras, a C compiler 'mingw' + a load of library files.
Not many members here who compile for Windows. My advice: Post again on http://www.gimpchat.com where you might get a suitable answer. I would also include a link to that code IntensityAdj.c I have had a search and can not find that as a file.
Some not-too-old examples of questions from gimpchat
http://gimpchat.com/viewtopic.php?f=8&t=14393 http://gimpchat.com/viewtopic.php?f=9&t=13827 and their problems.