diff --git a/extern/gnuwin/CMakeLists.txt b/extern/gnuwin32/CMakeLists.txt
similarity index 100%
rename from extern/gnuwin/CMakeLists.txt
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diff --git a/extern/gnuwin/bin/win32/jpeg62.dll b/extern/gnuwin32/bin/win32/jpeg62.dll
similarity index 100%
rename from extern/gnuwin/bin/win32/jpeg62.dll
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diff --git a/extern/gnuwin/bin/win32/libpng12.dll b/extern/gnuwin32/bin/win32/libpng12.dll
similarity index 100%
rename from extern/gnuwin/bin/win32/libpng12.dll
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diff --git a/extern/gnuwin/bin/win32/libtiff3.dll b/extern/gnuwin32/bin/win32/libtiff3.dll
similarity index 100%
rename from extern/gnuwin/bin/win32/libtiff3.dll
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diff --git a/extern/gnuwin/bin/win32/zlib1.dll b/extern/gnuwin32/bin/win32/zlib1.dll
similarity index 100%
rename from extern/gnuwin/bin/win32/zlib1.dll
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diff --git a/extern/gnuwin/include/jconfig.h b/extern/gnuwin32/include/jconfig.h
similarity index 100%
rename from extern/gnuwin/include/jconfig.h
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diff --git a/extern/gnuwin/include/jerror.h b/extern/gnuwin32/include/jerror.h
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rename from extern/gnuwin/include/jerror.h
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diff --git a/extern/gnuwin/include/jmorecfg.h b/extern/gnuwin32/include/jmorecfg.h
similarity index 100%
rename from extern/gnuwin/include/jmorecfg.h
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diff --git a/extern/gnuwin/include/jpeglib.h b/extern/gnuwin32/include/jpeglib.h
similarity index 100%
rename from extern/gnuwin/include/jpeglib.h
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diff --git a/extern/gnuwin/include/png.h b/extern/gnuwin32/include/png.h
similarity index 100%
rename from extern/gnuwin/include/png.h
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diff --git a/extern/gnuwin/include/pngconf.h b/extern/gnuwin32/include/pngconf.h
similarity index 100%
rename from extern/gnuwin/include/pngconf.h
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diff --git a/extern/gnuwin/include/tiff.h b/extern/gnuwin32/include/tiff.h
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rename from extern/gnuwin/include/tiff.h
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diff --git a/extern/gnuwin/include/tiffconf.h b/extern/gnuwin32/include/tiffconf.h
similarity index 100%
rename from extern/gnuwin/include/tiffconf.h
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diff --git a/extern/gnuwin/include/tiffio.h b/extern/gnuwin32/include/tiffio.h
similarity index 100%
rename from extern/gnuwin/include/tiffio.h
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diff --git a/extern/gnuwin/include/tiffvers.h b/extern/gnuwin32/include/tiffvers.h
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rename from extern/gnuwin/include/tiffvers.h
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diff --git a/extern/gnuwin/include/zconf.h b/extern/gnuwin32/include/zconf.h
similarity index 100%
rename from extern/gnuwin/include/zconf.h
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diff --git a/extern/gnuwin/include/zlib.h b/extern/gnuwin32/include/zlib.h
similarity index 100%
rename from extern/gnuwin/include/zlib.h
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diff --git a/extern/gnuwin/lib/jpeg.def b/extern/gnuwin32/lib/jpeg.def
similarity index 100%
rename from extern/gnuwin/lib/jpeg.def
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diff --git a/extern/gnuwin/lib/jpeg.lib b/extern/gnuwin32/lib/jpeg.lib
similarity index 100%
rename from extern/gnuwin/lib/jpeg.lib
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diff --git a/extern/gnuwin/lib/libpng.def b/extern/gnuwin32/lib/libpng.def
similarity index 100%
rename from extern/gnuwin/lib/libpng.def
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diff --git a/extern/gnuwin/lib/libpng.lib b/extern/gnuwin32/lib/libpng.lib
similarity index 100%
rename from extern/gnuwin/lib/libpng.lib
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diff --git a/extern/gnuwin/lib/libpng12.def b/extern/gnuwin32/lib/libpng12.def
similarity index 100%
rename from extern/gnuwin/lib/libpng12.def
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diff --git a/extern/gnuwin/lib/libtiff.def b/extern/gnuwin32/lib/libtiff.def
similarity index 100%
rename from extern/gnuwin/lib/libtiff.def
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diff --git a/extern/gnuwin/lib/tiff.lib b/extern/gnuwin32/lib/tiff.lib
similarity index 100%
rename from extern/gnuwin/lib/tiff.lib
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diff --git a/extern/gnuwin/lib/zlib.def b/extern/gnuwin32/lib/zlib.def
similarity index 100%
rename from extern/gnuwin/lib/zlib.def
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diff --git a/extern/gnuwin/lib/zlib.lib b/extern/gnuwin32/lib/zlib.lib
similarity index 100%
rename from extern/gnuwin/lib/zlib.lib
rename to extern/gnuwin32/lib/zlib.lib