NIOS and atomic primitives

[Joel Sherrill]

On 4/20/2015 5:04 AM, Jonathan Wakely wrote:
> On 19 April 2015 at 03:06, Sandra Loosemore wrote:
>> Is it one of the standard g++ or libstdc++ test cases that is failing? I
>> could check what nios2-elf does with it if I knew what to look for.
> Libstdc++ does not use the __sync built-ins in the 4.9 branch, it has
> switched to the __atomic ones which should be provided by libatomic,
> if that exists for the target.
This is with 4.9.2.  This is the only RTEMS target giving this error so
I must
be missing the magic bit of configurery for it.

/users/joel/rtems-4.11-work/rtems-source-builder/rtems/build/nios2-rtems4.11-gcc-4.9.2-newlib-2.2.0.20150323-x86_64-linux-gnu-1/build/nios2-rtems4.11/libstdc++-v3/include/ext/atomicity.h:49:
undefined reference to `__sync_fetch_and_add_4'
/users/joel/rtems-4.11-work/tools/lib/gcc/nios2-rtems4.11/4.9.2/libstdc++.a(locale-inst.o):/users/joel/rtems-4.11-work/rtems-source-builder/rtems/build/nios2-rtems4.11-gcc-4.9.2-newlib-2.2.0.20150323-x86_64-linux-gnu-1/build/nios2-rtems4.11/libstdc++-v3/include/ext/atomicity.h:49:
more undefined references to `__sync_fetch_and_add_4' follow

Where should I be looking?

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill@OARcorp.com        On-Line Applications Research
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