IEEE Math is not working on Alpha Rawhide

IEEE Math is not working on Alpha Rawhide

[Steffen.Pelzetter]

Hello,

I try to compile the rrdtool on my system
a digitalserver 7305 (rawhide) with debian 3.1 kernel 2.6.20 and
gcc  4.1.1.

The tool does some floatingpoint calculation
using IEEE Math.

If I try to run ./configure there is a problem:

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... not isnan(NaN) ... 
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 (tobi at oetiker.ch
).
Check config.log to see what went wrong ...



How can I make gcc support IEEE- math on my system?
It seems to be a bug, because on Kernel 2.4 I was able to compile the 
tool.

Thanks SteffenP.

Re: IEEE Math is not working on Alpha Rawhide

[Jim Wilson]

Steffen.Pelzetter@nexans.com wrote:
> checking if IEEE math works with the -mieee switch... not isnan(NaN) ... 
> no
> Check config.log to see what went wrong ...

The -mieee option should have worked.  You will need to look at the 
config.log file to see what went wrong.

> How can I make gcc support IEEE- math on my system?
> It seems to be a bug, because on Kernel 2.4 I was able to compile the 
> tool.

If this worked on a different kernel with the same compiler version, 
then that indicates a kernel bug.
-- 
Jim Wilson, GNU Tools Support, http://www.specifix.com