[rrd-users] Re: IEEE math on PPC

[learnrrd tool]

Hi,

My hardware / os details are :

Hardware - Power Quic III 

OS - Linux 2.4.20

GCC - 3.4.1

Did you have to give any special switch to GCC to indicate to use IEEE
floating point, or did you have to compile the kernel with some
special math emulation options to make it work?

Also, could you please tell me the command you gave to cross compile
for power4 chip ? You must be using a cross compiler rite?

Thanks in advance for your response. :)

Thanks!



On 8/16/05, Frédéric Mangeant <frederic.mangeant at steria.com> wrote:
> learnrrd tool a écrit :
> 
> >Hi,
> >
> >I am using a PPC board and I am trying to compile rrdtool-1.2.11 for
> >it. When I run configure, this is the error I get:
> >
> >checking for isinf... yes
> >checking if IEEE math works out of the box... no
> >checking if IEEE math works with the -ieee switch... no
> >checking if IEEE math works with the -qfloat=nofold switch... no
> >checking if IEEE math works with the -w -qflttrap=enable:zerodivide... no
> >checking if IEEE math works with the -mieee switch... no
> >checking if IEEE math works with the -q float=rndsngl switch... no
> >checking if IEEE math works with the -OPT:IEEE_NaN_inf=ON switch... no
> >checking if IEEE math works with the -OPT:IEEE_comparisons=ON switch... no
> >checking if IEEE math works with fpsetmask(0)... no
> >checking if IEEE math works with signal(SIGFPE,SIG_IGN)... no
> >configure: error:
> >Your Compiler does not do propper IEEE math ... Please find out how to
> >make IEEE math work with your compiler and let me know (oetiker at ee.ethz.ch).
> >Check config.log to see what went wrong ...
> >
> >
> >What does this error mean? Where can I check if IEEE math is indeed
> >supported on PPC ? Is it the kernel / Compiler ? Could you point out
> >any specific header / .config files I can check to verify if IEEE math
> >is supported well on PPC.
> >
> >Thanks!
> >
> >
> 
> Hi
> 
> on which hardware/OS are you trying to build RRDtool 1.2.11 ?
> 
> I got it to compile with AIX 5.1 ML8 (on a pSeries 670, Power4+ chip)
> and GCC 3.3.2 :
> 
> [...]
> checking if IEEE math works out of the box... yes
> [...]
> 
> --
> 
> Frédéric Mangeant
> 
> Steria EDC Sophia-Antipolis
> 
> 
> 
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