can build toolchain in two steps, but not one

[Dan Kegel]

Robert P. J. Day wrote:
> (SIDE NOTE:  previously, to select sh3eb, i had the following line in
> the .dat file:
> 
> 	TARGET_CFLAGS="-O -m3 -mb"
> 
> however, based on this excerpt from arch/sh/Makefile:
> 
> 	cflags-y                                := -mb
> 	cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      := -ml
> 	...
> 	cflags-$(CONFIG_CPU_SH3)                += -m3
> 
> it appears that i can delete those two -m flags and it won't make any
> difference, so i dropped them and it still worked.)

The TARGET_CFLAGS are there mostly for the benefit of building glibc.

> + make ARCH=sh prepare include/linux/version.h
>   SPLIT   include/linux/autoconf.h -> include/config/*
>   CC      scripts/mod/empty.o
> cc1: error: invalid option â'b'
> cc1: error: invalid option â'3'
> make[2]: *** [scripts/mod/empty.o] Error 1
> make[1]: *** [scripts/mod] Error 2
> make: *** [scripts] Error 2
> 
> 
>   what that tells me is that the perfectly valid SH3 options -mb and
> -m3 are unrecognized, which further suggests that the wrong compiler
> is being used since it doesn't recognize SH3-specific options.

Maybe the problem is that the kernel makefile is applying
target cflags when it shouldn't, for some reason.
- Dan

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