nios2 and atomic operations

[Joel Sherrill]

Hi

As I mentioned earlier, nios2 does not link C++ iostream because of an
undefined reference:

/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

I don't see anything obviously different about this target. Can someone
take a look at this please? It has to be something small.

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