I'm able to get around this issue (which is causing most MIPS builds to fail right now) with the following change:
Index: sys/arch/pmax/conf/INSTALL =================================================================== RCS file: /cvsroot/src/sys/arch/pmax/conf/INSTALL,v retrieving revision 1.71 diff -u -r1.71 INSTALL --- sys/arch/pmax/conf/INSTALL 20 Jul 2014 10:06:11 -0000 1.71 +++ sys/arch/pmax/conf/INSTALL 12 Jul 2016 08:21:55 -0000 @@ -12,7 +12,7 @@ #options INCLUDE_CONFIG_FILE # embed config file in kernel binary -makeoptions COPTS="-Os -mmemcpy" # Optimise for space. Implies -O2 +#makeoptions COPTS="-Os -mmemcpy" # Optimise for space. Implies -O2 maxusers 8
