Here is a diff to fix openscad build with newer Boost.
Index: patches/patch-src_import_cc =================================================================== RCS file: patches/patch-src_import_cc diff -N patches/patch-src_import_cc --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-src_import_cc 4 Dec 2020 01:34:56 -0000 @@ -0,0 +1,15 @@ +$OpenBSD$ + +Fix build with newer Boost. + +Index: src/import.cc +--- src/import.cc.orig ++++ src/import.cc +@@ -50,7 +50,6 @@ namespace fs = boost::filesystem; + #include <boost/assign/std/vector.hpp> + using namespace boost::assign; // bring 'operator+=()' into scope + +-#include <boost/detail/endian.hpp> + #include <cstdint> + + extern PolySet * import_amf(std::string, const Location &loc);
