Is OpenNURBS required?

[atomicdog]

Is OpenNurbs a required dependence for BRL-CAD?

I'm trying to compile on PowerPC but I'm getting errors so I want to try the minimally necessary first.

[starseeker]

Yes, OpenNURBS is required. What errors are you seeing?

[atomicdog]

I added add_compile_definitions(ON_LITTLE_ENDIAN=TRUE) to the CMakelist.txtof OpenNURBS to fix one issue.

Now there's a problem with ON__UINT_PTR and ON__UINT32. First, I build with g++ (Debian 12.2.0-14) 12.2.0 but also tried clang++ which shows the same error.

[123/5060] Building CXX object src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_error.cpp.o
FAILED: src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_error.cpp.o 
/usr/local/bin/clang++ -DBRLCAD_FEATURE_EXTEND_UV_OVER_CLOSED_SEAMS -DHAVE_SYS_STAT_H -DON_COMPILING_OPENNURBS -DON_LITTLE_ENDIAN=TRUE -I/opt/src/brlcad/build/include/brlcad -I/opt/src/brlcad/build/include -I/opt/src/brlcad/include -w -m64 -fPIC   -g -ggdb3 -std=c++14 -MD -MT src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_error.cpp.o -MF src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_error.cpp.o.d -o src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_error.cpp.o -c /opt/src/brlcad/src/other/openNURBS/opennurbs_error.cpp
/opt/src/brlcad/src/other/openNURBS/opennurbs_error.cpp:640:14: error: cast from pointer to smaller type 'ON__UINT_PTR' (aka 'unsigned int') loses information
  640 |   if ( 0 == ((ON__UINT_PTR)this) )
      |              ^~~~~~~~~~~~~~~~~~
1 error generated.
[124/5060] Building CXX object src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_terminator.cpp.o
FAILED: src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_terminator.cpp.o 
/usr/local/bin/clang++ -DBRLCAD_FEATURE_EXTEND_UV_OVER_CLOSED_SEAMS -DHAVE_SYS_STAT_H -DON_COMPILING_OPENNURBS -DON_LITTLE_ENDIAN=TRUE -I/opt/src/brlcad/build/include/brlcad -I/opt/src/brlcad/build/include -I/opt/src/brlcad/include -w -m64 -fPIC   -g -ggdb3 -std=c++14 -MD -MT src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_terminator.cpp.o -MF src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_terminator.cpp.o.d -o src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_terminator.cpp.o -c /opt/src/brlcad/src/other/openNURBS/opennurbs_terminator.cpp
/opt/src/brlcad/src/other/openNURBS/opennurbs_terminator.cpp:47:10: error: cast from pointer to smaller type 'ON__UINT_PTR' (aka 'unsigned int') loses information
   47 |   return reinterpret_cast<ON__UINT_PTR>(m_callback_function);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[126/5060] Building CXX object src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_knot.cpp.o
FAILED: src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_knot.cpp.o 
/usr/local/bin/clang++ -DBRLCAD_FEATURE_EXTEND_UV_OVER_CLOSED_SEAMS -DHAVE_SYS_STAT_H -DON_COMPILING_OPENNURBS -DON_LITTLE_ENDIAN=TRUE -I/opt/src/brlcad/build/include/brlcad -I/opt/src/brlcad/build/include -I/opt/src/brlcad/include -w -m64 -fPIC   -g -ggdb3 -std=c++14 -MD -MT src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_knot.cpp.o -MF src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_knot.cpp.o.d -o src/other/openNURBS/CMakeFiles/openNURBS-obj.dir/opennurbs_knot.cpp.o -c /opt/src/brlcad/src/other/openNURBS/opennurbs_knot.cpp
/opt/src/brlcad/src/other/openNURBS/opennurbs_knot.cpp:693:41: error: cast from pointer to smaller type 'ON__INT_PTR' (aka 'int') loses information
  693 |   bool bSilentError = ( 0 != (lowbit & ((ON__INT_PTR)text_logx)) );
      |     
```                                    ^~~~~~~~~~~~~~~~~~~~~~