Heya, I have added a nasm target to jam that allows the APE reader sources to build. I have not added APE_reader to the Jamfile that includes all the codecs since nasm is not really in our build tools so it should not break the build. I might be able to use it for the asm files in avcodec as well (they compile but cavsdsp_mmx.c not so much) If this is not the way to handle asm files then let me know. -- Cheers David