Problems with printing double-values with printf and sprintf

[Sebastian Huber]

Ralf Corsepius wrote:
> On 09/04/2009 05:47 PM, Joel Sherrill wrote:
>> Ralf Corsepius wrote:
>>> On 09/04/2009 04:50 PM, Sebastian Huber wrote:
>>>> The calculation in dtoa.c line 295 is wrong because the values for 
>>>> Exp_shift1
>>>> and Exp_mask are invalid for the little endian ARM (this is only a 
>>>> good guess
>>>> at the moment).
>>>> It looks like the __IEEE_LITTLE_ENDIAN is undefined.
>>> Code example with corresponding compiler call, please.
>>>
>> Just so it ends up in the email archives. On IRC, I
>> asked him to check the cpp predefines when
>> his CPU model is selected.
>>
>> arm-rtems4.10-gcc -dM -E -mXXX - </dev/null
> I am using
> arm-rtems4.10-gcc -Wp,dD -save-temps -m<cpu> code.c
>
>> Those settings must be right and then ieeefp.h
>> and friends have to interpret that combination
>> correctly.
>> Very likely just a subtle conditional compilation
>> error in newlib.
> This is what I suspect, too.
>
> However, to verify this, the exact compiler call Sebastian is using 
> would be necessary.
>
> Ralf
>
>

I use the latest newlib RPM on SuSE 11.1. The header files that cause 
the problem are not installed. The target is a ARMv4 architecture with 
little endian. The floating-point arithmetic itself is correct.

-- 
Sebastian Huber, Embedded Brains GmbH

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