Mark as broken on powerpc64.
The full message is:
/usr/bin/ld: Graphics/CMakeFiles/vtkGraphics.dir/vtkProbeFilter.cxx.o(.text+0x182c): sibling call optimization to '_ZN14vtkProbeFilter26SetValidPointMaskArrayNameEPKc' does not allow automatic multiple TOCs; recompile with -mminimal-toc or -fno-optimize-sibling-calls, or make '_ZN14vtkProbeFilter26SetValidPointMaskArrayNameEPKc' extern
This is beyond the scope of what I understand how to fix.