http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50457



--- Comment #12 from Kazumoto Kojima <kkojima at gcc dot gnu.org> 2012-10-02 
02:17:51 UTC ---

(In reply to comment #11)

> Created attachment 28321 [details]

> cleanup libgcc/config/sh/linux-atomic



Works fine for me.



> (three leading underscores)



You might get one extra underscore because embed-elf SH compiler uses one

underscore as USER_LABEL_PREFIX.  It's OK for linux which uses null

USER_LABEL_PREFIX.  I've got



    .long    __sync_val_compare_and_swap_4



with sh4-unknown-linux-gnu gcc for that case.

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