[vtkusers] OpenGL errors on Cygwin

[Bill Lorensen]

Try building vtk with shared libraries?

On Wed, Sep 8, 2010 at 9:44 PM, David Doria <daviddoria+vtk at gmail.com> wrote:
> I am getting these linker errors when compiling the latest git version
> in Cygwin (in Windows 7).
>
> ../../../bin/libvtkRendering.a(vtkXOpenGLRenderWindow.cxx.o):vtkXOpenGLRenderWindow.cxx:(.text+0x41f5):
> undefined reference to `_glXDestroyContext'
> (many more _glXSOMETHING errors)
>
> I have ALL of the cygwin packages installed, so I don't think it is a
> missing package problem.
>
> Here is the relevant make output with VERBOSE=1:
>
> /usr/bin/c++.exe     -Wno-deprecated -mwin32
> CMakeFiles/GraphicsCxxTests.dir/GraphicsCxxTests.cxx.o
> (more .o files...)
> CMakeFiles/GraphicsCxxTests.dir/TestDecimatePolylineFilter.cxx.o  -o
> ../../../bin/GraphicsCxxTests.exe
> -Wl,--out-implib,../../../bin/libGraphicsCxxTests.dll.a
> -Wl,--major-image-version,0,--minor-image-version,0
> ../../../bin/libvtkRendering.a ../../../bin/libvtkIO.a
> ../../../bin/libvtkDICOMParser.a ../../../bin/libvtkNetCDF_cxx.a
> ../../../bin/libvtkNetCDF.a ../../../bin/libvtkmetaio.a -lcomctl32
> ../../../bin/libvtksqlite.a ../../../bin/libvtkpng.a
> ../../../bin/libvtktiff.a ../../../bin/libvtkzlib.a
> ../../../bin/libvtkjpeg.a ../../../bin/libvtkexpat.a -lvfw32
> ../../../bin/libvtkGraphics.a ../../../bin/libvtkverdict.a
> ../../../bin/libvtkImaging.a ../../../bin/libvtkFiltering.a
> ../../../bin/libvtkCommon.a ../../../bin/libvtksys.a -lws2_32 -lm
> -lpthread -lwsock32 -lgdi32 ../../../bin/libvtkftgl.a
> ../../../bin/libvtkfreetype.a /usr/lib/w32api/libopengl32.a -lXt -lSM
> -lICE -lX11 -lXext
>
> I've been talking with the Cygwin people for the last couple of days.
> Here are the highlights:
>
> 1) "These symbols are provided by libGL, but you'll notice that
> libvtkftgl.a comes after that on the command line you are using."
>
> 2) "you should not be linking with /usr/lib/w32api/libopengl32.a"
>
> 3) "comctl32, vfw32, gdi32, wsock32, ws2_32 also seem unlikely to be right."
>
> Anyone have any thoughts on this?
>
> David
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