TO PATCH GAS FOR blargCPU: Apply existing-files-patches.patch. Copy blarg.sh to ld/emulparams/blarg.sh. Copy blarg.sc to ld/scripttempl/blarg.sc. Copy tc-blarg.c to gas/config/tc-blarg.c. Copy tc-blarg.h to gas/config/tc-blarg.h. Copy cpu-blarg.c to bfd/cpu-blarg.c. Copy elf32-blarg.c to bfd/elf32-blarg.c. ./configure --target=blarg-elf --prefix=/usr/local Hope, pray.