src/ifcgeom/kernels/opencascade/boolean_utils.cpp, OpenCascadeKernel.cpp,
and boolean_result.cpp logged diagnostics (including the "Processed
fully in 2D" family of messages) through the global Logger::Root()
singleton. IfcConvert's main() constructs its own Logger and wires it
to --log-file via SetOutput(), then threads that instance through
Converter/kernel constructors as logger_ (see AbstractKernel). Since
Logger::Root() is never itself configured with an output stream, every
Notice/Warning/Message call through it was silently dropped instead of
reaching the log file - Logger::Message's log1_/log2_ null checks just
no-op.
This made src/ifcopenshell-python/test/test_wall_opening.py fail: it
asserts on specific log messages that the underlying boolean-op code
was still emitting correctly, just to nowhere. The geometry itself was
never wrong.
Add a Logger*, defaulting to null, to boolean_settings (with a log()
accessor falling back to Logger::Root() for the few remaining
call sites with no injected logger available), thread it through
eliminate_narrow_operands and boolean_subtraction_2d_using_builder,
and have OpenCascadeKernel/boolean_result.cpp populate it from their
inherited logger_ member instead of relying on the global singleton.
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