Building Emacs (git sources from today) on NetBSD 9.3/x86_64:
1. I configured in a subdirectory (VPATH build) with options
     --disable-silent-rules --without-all --without-x
2. "make" succeeds.
3. "make check" leads to a process that eats 100% CPU time
   over several hours. Log file 'make-check.log' is attached.
   This process can be killed through Ctrl-C.

Bruno