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Re: -msoft-float ?

On Wed, 2002-01-02 at 15:55, Ivan wrote:
> hi all, i'm compiling the linux-2.4.17-pre2-ben0 kernel, and in the gcc 
> command i see -msoft-float... like this
> gcc -D__KERNEL__ -I/usr/src/linux-benh/include -Wall -Wstrict-prototypes 
> -Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -fno-common 
> -D__powerpc__ -fsigned-char -msoft-float -pipe -ffixed-r2 -Wno-uninitialized 
> -mmultiple -mstring    -c -o pe2.o pe2.c
> why gcc compiles the kernel with this option? i have a pismo, and kernel 
> settings are:
> #
> # Platform support
> #
> CONFIG_6xx=y
> # CONFIG_4xx is not set
> # CONFIG_POWER3 is not set
> # CONFIG_POWER4 is not set
> # CONFIG_8xx is not set
> # CONFIG_8260 is not set
> in .config
> and there are no references to soft-floats in the main Makefile
> is everything ok?

Yes, it's in arch/ppc/Makefile. It's used because floating point code in
the kernel would make things more complicated. And it doesn't really use
floating point arithmetic (at least not a lot).

Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member   /  CS student, Free Software enthusiast

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