I have a (C++) project using VTK (8.2) which I cross-compile to Windows using MXE (with cmake).
The latter information is relevant since the MXE folder contains all the libraries, including Qt, VTK and GLEW, and has actually built them.
This worked fine for quite a while. Then the build environment was updated (but not the MXE folder, mostly the computer was restarted and general updates were fetched) and since then linking fails with errors for libvtkRenderingVolumeOpenGL2-8.2 related to GLEW:
[8%] Linking CXX executable <name>.exe
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):
vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x4299):
undefined reference to `__imp___glewGenVertexArrays'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x42ae):
undefined reference to `__imp___glewGenBuffers'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x4300):
undefined reference to `__imp___glewDeleteVertexArrays'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x4323):
undefined reference to `__imp___glewBindBuffer'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x4331):
undefined reference to `__imp___glewDeleteBuffers'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x4353):
undefined reference to `__imp___glewBindBuffer'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x4361):
undefined reference to `__imp___glewDeleteBuffers'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x12cc3):
undefined reference to `__imp___glewBindVertexArray'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x12cd0):
undefined reference to `__imp___glewBindBuffer'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x12f0d):
undefined reference to `__imp___glewBindVertexArray'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x12f1a):
undefined reference to `__imp___glewBindBuffer'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x12f2b):
undefined reference to `__imp___glewBufferData'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text+0x1300d):
undefined reference to `__imp___glewBufferData'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text$_ZN18vtkVolumeStateRAIID1Ev[_ZN18vtkVolumeStateRAIID1Ev]+0x9):
undefined reference to `__imp___glewBindVertexArray'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLGPUVolumeRayCastMapper.cxx.obj):vtkOpenGLGPUVolumeRayCastMapper.cxx:(.text$_ZN18vtkVolumeStateRAIID1Ev[_ZN18vtkVolumeStateRAIID1Ev]+0x17):
undefined reference to `__imp___glewBindBuffer'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLProjectedTetrahedraMapper.cxx.obj):vtkOpenGLProjectedTetrahedraMapper.cxx:(.text+0x43ea):
undefined reference to `__imp___glewDrawRangeElements'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLProjectedTetrahedraMapper.cxx.obj):vtkOpenGLProjectedTetrahedraMapper.cxx:(.text+0x4494):
undefined reference to `__imp___glewBlitFramebuffer'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkOpenGLProjectedTetrahedraMapper.cxx.obj):vtkOpenGLProjectedTetrahedraMapper.cxx:(.text+0x48f7):
undefined reference to `__imp___glewBlitFramebuffer'
/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libvtkRenderingVolumeOpenGL2-8.2.a(vtkVolumeTexture.cxx.obj):vtkVolumeTexture.cxx:(.text+0x3349):
undefined reference to `__imp___glewTexSubImage3D'
collect2: error: ld returned 1 exit status
I made sure that libglew32s.a (and the other GLEW library files, just in case) is added to the required libraries in my cmake file:
target_link_libraries(<name> <other libraries> /var/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libGLEW.a /var/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libglew32.a /var/opt/mxe/usr/x86_64-w64-mingw32.static/lib/libglew32s.a)
I took a look into the symbols in libglew32s.a, and what I found was that while __glewGenVertexArrays exists, __imp___glewGenVertexArrays doesn’t.
I originally asked for help on StackOverflow: c++ - Problems linking GLEW with cmake - Stack Overflow
But it seems that my problem might be too exotic.
From some other questions in here I briefly assumed that it might be a OpenGL version incompatibility, or better to say that GLEW was compiled for OpenGL 1 while VTK 8.2 requires OpenGL 2, but given that MXE is build in one go, it would be kind of strange that some parts of it use different versions than others.
Can anybody help? Should I provide more of my information? (Didn’t want to make my question too big, but can gladly provide my cmake file, for example.)
Am I in the right place or do you think it is better to seek help in a forum for GLEW?