I've tried to build GWorkspace. But, when building gnustep-gui, gcc-mp-4.2 says, "I cannot recognize option '-weak_framework'.". The error message is following: gcc-mp-4.2 -fgnu-runtime -bundle -L/opt/local/lib -flat_namespace -undefined warning -o ./GSCUPS.bundle/./GSCUPS ./obj/GSCUPSPrincipalClass.o ./obj/GSCUPSPageLayout.o ./obj/GSCUPSPrintInfo.o ./obj/GSCUPSPrintOperation.o ./obj/GSCUPSPrintPanel.o ./obj/GSCUPSPrinter.o -L/opt/local/lib -L../../Source/./obj -L/opt/local/GNUstep/System/Library/Libraries/ -lcups -weak_framework Kerberos -framework CoreFoundation -framework Security -lz -lpthread -framework CoreFoundation -lgnustep-gui -lgnustep-base -lobjc -lm gcc-mp-4.2: Kerberos: No such file or directory gcc-mp-4.2: unrecognized option '-weak_framework' gnumake[3]: *** [GSCUPS.bundle/./GSCUPS] Error 1 gnumake[2]: *** [GSCUPS.all.bundle.variables] Error 2 gnumake[1]: *** [internal-all] Error 2 gnumake: *** [internal-all] Error 2 My system is, PowerBook Pro G5 MacOS X 10.5 Leopard(fresh install).