Hi, Apparently gdb 6.6 passes a -E endian option to the sim_open hook. The erc32 simulator does not parse this option and produces a error message like this: (gdb) tar sim unknown option -E open of big failed Connected to the simulator. The attached patch is in the style of the existing code and silently eats the -E option if the endian value is big or little. 2007-02-22 Joel Sherrill * interf.c: Add parsing of -E option to eliminate error message.