Hi Ángel González, Im not using any switches im directly using powerpc-motorola-elf-as.exe to generate the assembly file.. The syntax im using :-powerpc-motorola-elf-as.exe -o inst_abc.o inst_abc.s_ -- View this message in context: http://gcc.1065356.n5.nabble.com/Generating-Assembly-Files-Using-GCC-tp1000051p1001127.html Sent from the gcc - Help mailing list archive at Nabble.com.