Fix log (unchecked are in progress):
SlicerDMRI
SlicerRT : Iostream missing include fixes by sjh26 · Pull Request #314 · SlicerRt/SlicerRT · GitHub
MeshToLabelMap
SlicerVMTK: Pending this vmtk fix, Include iostream to build against VTK 9.6 by chir-set · Pull Request #481 · vmtk/vmtk · GitHub, my branch here: GitHub - sjh26/SlicerExtension-VMTK at fix-iostream · GitHub
VASSTAlgorithms: BUG: Add missing #include <iostream> to C++ files using cerr/endl by sjh26 · Pull Request #5 · VASST/VASSTAlgorithms · GitHub
SlicerAutoscoperM: Autoscoper PR: COMP: Fix build with VTK 9.6 by sjh26 · Pull Request #328 · BrownBiomechanics/Autoscoper · GitHub
CarreraSlice: COMP: Fix iostream include hygiene across C++ sources (VTK 9.6 compat) by sjh26 · Pull Request #14 · ikolesov/CarreraSlice · GitHub
CMFreg: COMP: VTK 9.6 build fix - iostream include hygiene by sjh26 · Pull Request #41 · DCBIA-OrthoLab/CMFreg · GitHub
PortPlacement: COMP: VTK 9.6 build fix - add missing <iostream> include by sjh26 · Pull Request #4 · SlicerIGT/PortPlacement · GitHub
ShapeVariationAnalyzer: COMP: VTK 9.6 Build Fix - Fix iostream include hygiene by sjh26 · Pull Request #72 · DCBIA-OrthoLab/ShapeVariationAnalyzer · GitHub
SlicerFreeSurfer: COMP: VTK 9.6 Build Fix - Fix iostream include hygiene by sjh26 · Pull Request #22 · PerkLab/SlicerFreeSurfer · GitHub