Getting C++ to work on ARM

Joel Sherrill <> joel.sherrill at
Fri Oct 21 15:42:05 UTC 2005

Jay Monkman wrote:
> I'm trying to run a C++ program on ARM. I suspect C++ has never worked on ARM in
> RTEMS, but I'm not positive. I'm using a fairly recent checkout of the CVS HEAD
> (about 2 weeks old).  I've tested this on Coldfire and it works fine, so I'm
> pretty sure the problem lies within the ARM specfic code.
> I'm running the iostream sample program on ARM, and it crashes. It dies
> somewhere within
> 	std::cout << "\n\n*** HELLO WORLD TEST ***" << std::endl;
>>From what I can tell _M_streambuf within the output stream is never getting set,
> so later when something is sent to the stream, a NULL pointer get dereferenced
> and BOOM!
> Can anyone give me any pointers to how to start debugging this? is a good starting 
point.  There were some formatting errors in it from the PhpWiki 
conversion but I tried to fix them.  If you see more feel, free to edit 
and fix.  Mostly they mess up code examples with _.

The trick it to have a properly constructure init and fini section. 
That usually requires magic inthe bsp_specs and linkcmds.  Look at what 
gcc does by default (no -qrtems) and the linker scripts installed in the 

> Thanks.

Joel Sherrill, Ph.D.             Director of Research & Development
joel at                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
    Support Available             (256) 722-9985

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