Hi, I don't know if this is the right place to ask. Am sorry, but I could not get a solution to this in other lists. I was trying to enable the "thumb" option for gcc. I just tried to compile a helloworld.c file with the "-mthumb" option. gcc said that "unknown option: thumb". So, I enabled MULTILIB_OPTIONS += mcpu=arm7 MULTILIB_DIRNAMES += nofmult MULTILIB_EXCEPTIONS += *mthumb*/*mcpu=arm7* in "gcc/config/arm/t-arm-elf" file, configured gcc, re-installed it. but, could not enable the "-mthumb" option although gcc seems to work fine. I installed gcc-3.4.2. arm-elf-gcc version 2.95.3 20010315 with the coldfire patches is also installed. I googled without any success. Similar questions were mostly unanswered. What am I missing here. Any pointers/guidance would be of great help to me. Thanks Joseph Antony -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/