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Using __sync_* builtins within libgcc code
- From: Luke Dalessandro <luked at cs dot rochester dot edu>
- To: gcc at gcc dot gnu dot org
- Date: Mon, 09 Jun 2008 23:21:48 -0400
- Subject: Using __sync_* builtins within libgcc code
I'm making some modifications to exception handling inside of unwind-dw2-fde.c
that I'd like to use __sync_bool_compare_and_swap for, unfortunately I can't
seem to figure out how to correctly use builtins in the context of libgcc.
I've tried a bunch of different things, but I consistently get the error
bin/../lib/gcc/i686-pc-linux-gnu/4.3.1/../../../libgcc_s.so: undefined
reference to `__sync_bool_compare_and_swap_4'
so clearly I'm not getting this symbol included correctly when I build. Any
advice would be appreciated.
Luke