Problems with printing double-values with printf and sprintf

[Christian Mauderer <Christian dot Mauderer at embedded-brains dot de>]

Hello,

I have an embedded artists LPC2478 test board with an arm-core in
little-endian mode. By running the tests from RTEMS-testsuite I have
found that one test (the paranoia-test) breaks. After some time of
debugging I was able to locate the problem.
The program breaks when trying to print a double-value to the serial
line with "printf ("Radix = %f .\n", Radix);". At this command the
processor runs into an exception and ends in an endless loop. The same
thing happens, if I use the sprintf() command instead to put the output
into a string. One of my colleagues said, that he knows that problem
with printing double-values from other programs. But he has also no
solution till now.

After an internet-research i've found the following page:
http://quadcopter.wordpress.com/2009/08/01/toolchain-wrestling/
The problem described there sounds similar to mine and could give a hint
for the reason. But the solution the writer has found don't fits for me.

I'm using the newlib 1.17.0 with RTEMS 4.10 patches.

I hope that anyone on this list could give me a hint, how to solve the
problem of the not working printf().

Kind regards,
Christian Mauderer

-- 
Christian Mauderer, embedded brains GmbH

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