All this does is put "CONFIG_BINFMT_IRIX is not set" into the config files so that when switching dual-endian systems from LE to BE this will default to "n" instead of "y". The main problem with this is that, in general, there is no need/desire to have CONFIG_BINFMT_IRIX included just because the kernel is BE. Rather than being forced to disable this, I think the default should be off. In some older kernels, it this causes compile errors, but that problem doesn't seam to exit in the latest 2.4 tree. I tested this with menuconfig and xconfig. I'm not an expert in all the subtle dependencies issues with the config.in files so there may be a better way do to this. cvs diff -uN arch/mips/config-shared.in Index: arch/mips/config-shared.in =================================================================== RCS file: /home/cvs/linux/arch/mips/Attic/config-shared.in,v retrieving revision 1.1.2.80 diff -u -r1.1.2.80 config-shared.in --- arch/mips/config-shared.in 5 Aug 2003 11:13:39 -0000 1.1.2.80 +++ arch/mips/config-shared.in 5 Aug 2003 17:07:24 -0000 @@ -817,6 +817,8 @@ if [ "$CONFIG_CPU_LITTLE_ENDIAN" = "n" ]; then bool 'Include IRIX binary compatibility' CONFIG_BINFMT_IRIX +else + define_bool CONFIG_BINFMT_IRIX n fi if [ "$CONFIG_CPU_R10000" = "y" ]; then