You need to specify margins for advent.pli (because the text outside them is not part of the source code), and an output file name: ./plic '-m(2,72)' -oadv

You need to specify margins for advent.pli (because the text outside them is not part of the source code), and an output file name: ./plic '-m(2,72)' -oadvent.o advent.pli Then link with this command: ld --oformat=elf32-i386 -melf_i386 -z muldefs -Bstatic -e main -lprf -L ./lib -o advent advent.o That gets you a binary which will run, unfortunately something still doesn't work right when loading the advent.dat file: Initializing... Reading section # 1 Fatal error # 0 (the one included in the zip file does work however, so it's likely another missing option rather than a problem with the compiler?)