ohrrpgce fbc 0.22 compile fail on Mac OS X 10.11

palsink:~/src/ohr/wip james$ scons
scons: Reading SConscript files ...
scons: done reading SConscript files.
scons: Building targets ...
reloadbasic/reloadbasic.py --careful bmod.rbas -o build/bmod.rbas.bas
fbc -c build/bmod.rbas.bas -o build/bmod.rbas.o -mt -exx -g -O 2 -arch 686 -entry SDL_main -d IS_GAME -m game
reloadbasic/reloadbasic.py --careful menustuf.rbas -o build/menustuf.rbas.bas
fbc -c build/menustuf.rbas.bas -o build/menustuf.rbas.o -mt -exx -g -O 2 -arch 686 -entry SDL_main -d IS_GAME -m game
reloadbasic/reloadbasic.py --careful moresubs.rbas -o build/moresubs.rbas.bas
fbc -c build/moresubs.rbas.bas -o build/moresubs.rbas.o -mt -exx -g -O 2 -arch 686 -entry SDL_main -d IS_GAME -m game
reloadbasic/reloadbasic.py --careful savegame.rbas -o build/savegame.rbas.bas
version_info(["ver.txt", "iver.txt", "distver.bat"], ["codename.txt"])
fbc -c build/savegame.rbas.bas -o build/savegame.rbas.o -mt -exx -g -O 2 -arch 686 -entry SDL_main -d IS_GAME -m game
reloadbasic/reloadbasic.py --careful purchase.rbas -o build/purchase.rbas.bas
fbc -c build/purchase.rbas.bas -o build/purchase.rbas.o -mt -exx -g -O 2 -arch 686 -entry SDL_main -d IS_GAME -m game
fbc -c build/common.rbas.bas -o build/game-common.rbas.o -mt -exx -g -O 2 -arch 686 -entry SDL_main -d IS_GAME -m game
fbc -c build/loading.rbas.bas -o build/game-loading.rbas.o -mt -exx -g -O 2 -arch 686 -entry SDL_main -d IS_GAME -m game
gcc -o build/os_unix.o -c -g -Wall --std=gnu99 -O3 -DFBCVERSION=220 -mmacosx-version-min=10.4 -m32 -mpreferred-stack-boundary=2 os_unix.c
clang: error: unknown argument: '-mpreferred-stack-boundary=2'
scons: *** [build/os_unix.o] Error 1
scons: building terminated because of errors.