Is it possible by hacking the specs file to change the target for arm-elf-gcc from -marm to -mthumb? I tried a few obvious things like changing marm in *multilib_defaults to mthumb, but this did not have the desired effect.
You have to do more than that. multilib_defaults only controls what libraries we link against. You also need to pass -mthumb by default to cc1 and perhaps also the assembler and linker. Try using gcc -v -mthumb and comparing the result against gcc -v, and then writing specs that mimic what -v -mthumb does.
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Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com
