Hello, I use the h8300-elf-gcc to build eCos for Renesas EDOSK-2674 board. eCos requires that char arrays are aligned to a 4 Byte boundary. This can be done for application char arrays in this way: __attribute__ ((aligned (4))); But the char arrays are inside the eCos source code and therefore a compiler flag is required in order to change gcc default behaviour. I carefully read the documentation for the h8300-elf-gcc but I could not found such a flag that forces h8300-elf-gcc to align char arrays to a 4 Byte boundary. Does someone know if it is possible to change the behaviour of the h8300-elf-gcc in a way that it will align char arrays to a 4 byte boundary? Thank you very much Regards, Uwe eCos port for Renesas EDOSK-2674 http://www.htwm.de/ukindler/ecos