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-msoft-float ?

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_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?

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