VTK 8.1.0 on Cygwin 2.9.0 environment

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1) preparation
Install required packages using Cygwin's setup.exe.
In my opinion, the following packages (and their depending packages) are needed: 

 "unzip"
 "cmake"
 "gcc-g++"
 "make"
 "patch"
 "libjasper-devel"
 "libjpeg-devel"
 "libpng-devel"
 "libtiff-devel"
 "libhdf5-devel"
 "libbz2-devel"
 "zlib-devel"


2) apply patch
Get VTK-8.1.0.tar.gz, and apply my patch for Cygwin.

for example: 

$ cd /tmp/
$ tar xvzf VTK-8.1.0.tar.gz
$ gunzip VTK-8.1.0-cygwin-patch-20171225.txt.gz
$ cd VTK-8.1.0/
$ patch -p1 < ../VTK-8.1.0-cygwin-patch-20171225.txt


3) build and install
To build VTK, you must set VTK_IGNORE_CMAKE_CXX11_CHECKS flag in cmake, and also set an option "-std=gnu++14" to g++ compiler. If you do not set them, cmake tries to set "-std=c++11" in g++, which causes error in the building stage.
for example: 

$ mkdir /tmp/vtk_build/
$ cd /tmp/vtk_build/
If you want to use Win32 OpenGL, disable VTK_USE_X and indicate OpenGL libraries as following: 
$ cmake -D CMAKE_BUILD_TYPE:STRING=RELEASE \
        -D VTK_IGNORE_CMAKE_CXX11_CHECKS:BOOL=ON \
        -D CMAKE_CXX_FLAGS:STRING="-std=gnu++14" \
        -D BUILD_SHARED_LIBS:BOOL=OFF \
        -D VTK_USE_X:BOOL=OFF \
        -D OPENGL_INCLUDE_DIR:PATH=/usr/include/w32api/ \
        -D OPENGL_gl_LIBRARY:PATH=/usr/lib/w32api/libopengl32.a \
        -D OPENGL_glu_LIBRARY:PATH=/usr/lib/w32api/libglu32.a \
        -D VTK_USE_SYSTEM_HDF5:BOOL=ON \
        -D VTK_USE_SYSTEM_JPEG:BOOL=ON \
        -D VTK_USE_SYSTEM_PNG:BOOL=ON \
        -D VTK_USE_SYSTEM_TIFF:BOOL=ON \
        -D VTK_USE_SYSTEM_ZLIB:BOOL=ON \
        -D CMAKE_INSTALL_PREFIX:PATH=/usr/local/vtk-8.1.0/ \
        /tmp/VTK-8.1.0/
$ make -j ${NUMBER_OF_PROCESSORS} install
or you can use X11 OpenGL by enabling VTK_USE_X as following: 
$ cmake -D CMAKE_BUILD_TYPE:STRING=RELEASE \
        -D CMAKE_CXX_FLAGS:STRING="-std=gnu++14" \
        -D VTK_IGNORE_CMAKE_CXX11_CHECKS:BOOL=ON \
        -D BUILD_SHARED_LIBS:BOOL=OFF \
        -D VTK_USE_X:BOOL=ON \
        -D VTK_USE_SYSTEM_HDF5:BOOL=ON \
        -D VTK_USE_SYSTEM_JPEG:BOOL=ON \
        -D VTK_USE_SYSTEM_PNG:BOOL=ON \
        -D VTK_USE_SYSTEM_TIFF:BOOL=ON \
        -D VTK_USE_SYSTEM_ZLIB:BOOL=ON \
        -D CMAKE_INSTALL_PREFIX:PATH=/usr/local/vtk-8.1.0/ \
        /tmp/VTK-8.1.0/
$ make -j ${NUMBER_OF_PROCESSORS} install