blender @2.93.17: fatal error: 'half.h' file not found

[elteck]

See attached log file, blender does not compile, errors out on intel platform. The log file doesn't give a lot of details, it shows errors on alembic and openxr:

:info:build make[2]: *** [source/blender/io/alembic/CMakeFiles/bf_alembic.dir/intern/abc_customdata.cc.o] Error 1
:info:build make[2]: *** [source/blender/io/alembic/CMakeFiles/bf_alembic.dir/intern/abc_reader_archive.cc.o] Error 1
:info:build make[2]: *** [source/blender/io/alembic/CMakeFiles/bf_alembic.dir/intern/abc_reader_camera.cc.o] Error 1
:info:build make[2]: *** [source/blender/io/alembic/CMakeFiles/bf_alembic.dir/intern/abc_reader_curves.cc.o] Error 1
:info:build make[2]: *** [source/blender/io/alembic/CMakeFiles/bf_alembic.dir/intern/abc_reader_mesh.cc.o] Error 1
:info:build make[2]: *** [source/blender/io/alembic/CMakeFiles/bf_alembic.dir/intern/abc_reader_nurbs.cc.o] Error 1
:info:build make[1]: *** [source/blender/io/alembic/CMakeFiles/bf_alembic.dir/all] Error 2
:info:build make[2]: *** [source/blender/imbuf/intern/openexr/CMakeFiles/bf_imbuf_openexr.dir/openexr_api.cpp.o] Error 1

[elteck]

Build log file

[elteck]

I am on a Intel platform, os version 13.4 (Ventura), using Xcode 14.2

[ryandesign (Ryan Carsten Schmidt)]

The first error in the log is:

:info:build /opt/local/include/Alembic/Util/Foundation.h:66:10: fatal error: 'half.h' file not found
:info:build #include <half.h>
:info:build          ^~~~~~~~

half.h is part of openexr 2. The openexr port was recently updated to openexr 3 which is probably what broke this (and some other ports). If blender can be updated or fixed to work with openexr 3, great; if not, a new openexr2 port was created and blender could be changed to use that instead.