benchmarks/himenobench uses obsolete pkg_ commands which are long gone. %grep pkg_ benchmarks/himenobench/files/* benchmarks/himenobench/files/run_benchmark:pkg_delete himenobench-2004.08.16 ; pkg_add himenobench-2004.08.16-gcc34-opt.tbz benchmarks/himenobench/files/run_benchmark:pkg_delete himenobench-2004.08.16 ; pkg_add himenobench-2004.08.16-gcc34.tbz benchmarks/himenobench/files/run_benchmark:pkg_delete himenobench-2004.08.16 ; pkg_add himenobench-2004.08.16-gcc42-opt.tbz benchmarks/himenobench/files/run_benchmark:pkg_delete himenobench-2004.08.16 ; pkg_add himenobench-2004.08.16-gcc42.tbz
Upstream site is unavailable: http://accc.riken.jp/en/supercom/himenobmt/
It looks like upstream moved somewhere around here: https://i.riken.jp/en/supercom/documents/himenobmt/download/win-mac/
This port has no maintainer. If you can and want to, you can fix it.