Re: CT-NG: floating point support in Newlibs printf?

[Jeppe Ledet-Pedersen <jledet at space dot aau dot dk>]

Hi Yann,

On 2010-10-23 00:40, Yann E. MORIN wrote:
> Jeppe, All,
>
> On Thursday 21 October 2010 12:55:30 Jeppe Ledet-Pedersen wrote:
> > I have successfully compiled a toolchain for my ARM7TDMI with
> > crosstool-NG 1.8.1. I have used GCC 4.5.0, Newlib 1.18 and Binutils
> > 2.20.1, disabled EABI and software floating point. The full
> > build.log.bz2 can be downloaded from http://kom.aau.dk/~jledet/build.log.bz2
> >
> > I can compile my codebase with no errors, but I am having trouble when
> > trying to use printf and siblings with floating point values. Everything
> > else, including printf's with integers, seems to work as expected.
> [--SNIP--]
>
> Care to see if the attached is working for you?

First of all, thank you very much for the patch. Unfortunately, the 
problem persists, and I experience the exact same behavior as with my 
other toolchains. I think floating point printf is automatically enabled 
in Newlib unless explicitly disabled with --disable-newlib-io-float?

I found these two discussions from 2009, that mention the same issue:
http://www.rtems.com/ml/rtems-users/2009/august/msg00028.html
http://www.rtems.com/ml/rtems-users/2009/september/msg00072.html

I think I need to figure out the correct setting for the --with-float 
and --with-fpu switches.

> I was able to build a toolchain with it, but I have nothing to
> test the result on.

I updated to the CT-NG version in your repository. My build log can be 
downloaded from http://kom.aau.dk/~jledet/build_patched.log.bz2

> Regards,
> Yann E. MORIN.

Once again, thank you for your reply.

Best regards,
Jeppe

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