[vtkusers] Problems building support for Xdmf2 on VTK 7.1

[Patricio Palma C.]

Dear all

I am using VTK 7.1 for saving visualization data using XDMF2 format.
Current files produced are big, so I enabled XDMF_USE GZIP option hoping
that it activates the compression on the .h5 file.  However, during
compilation I get error messages due to undefined references (it seems that
XDMF2 is not depending on ZLIB). The compiler output  is:

CMakeFiles/vtkxdmf2.dir/gzstream.cxx.o: In function `gzstreambuf::open(char
const*,
int)':


vtk/VTK-7.1.0/ThirdParty/xdmf2/vtkxdmf2/libsrc/gzstream.cxx:61: undefined
reference to
`gzopen'

CMakeFiles/vtkxdmf2.dir/gzstream.cxx.o: In function
`gzstreambuf::close()':

vtk/VTK-7.1.0/ThirdParty/xdmf2/vtkxdmf2/libsrc/gzstream.cxx:72: undefined
reference to
`gzclose'

CMakeFiles/vtkxdmf2.dir/gzstream.cxx.o: In function
`gzstreambuf::underflow()':

vtk/VTK-7.1.0/ThirdParty/xdmf2/vtkxdmf2/libsrc/gzstream.cxx:90: undefined
reference to
`gzread'

CMakeFiles/vtkxdmf2.dir/gzstream.cxx.o: In function
`gzstreambuf::flush_buffer()':

vtk/VTK-7.1.0/ThirdParty/xdmf2/vtkxdmf2/libsrc/gzstream.cxx:107: undefined
reference to
`gzwrite'

collect2: error: ld returned 1 exit
status



gmake[2]: *** [lib/libvtkxdmf2-7.1.so.1] Error
1


gmake[1]: ***
[ThirdParty/xdmf2/vtkxdmf2/libsrc/CMakeFiles/vtkxdmf2.dir/all] Error 2



How can I solve that issue?

What do I have to do so vtkXdmfWriter creates a compressed  .h5 file ?



Thank you!
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