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Date:	Wed, 07 Sep 2005 08:33:36 -0700
From:	David Daney <ddaney@avtrex.com>
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To:	Matej Kupljen <matej.kupljen@ultra.si>
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Subject: Re: MIPS SF toolchain
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Matej Kupljen wrote:
> Hi
> 
> Can somebody tell me, what is the right way to make a soft float
> toolchain. I tried with crosstool with different flags for configure
> and gcc, but the resulting binaries still contains the FP instructions, 
> like swc1.
> 
> I used --with-float=soft and --nfp for gcc configure,
> --without-fp for glibc configure, and compiled glibc
> with -msoft-float flag.
> 
> Am I missing something, or am I using the wrong flags?
> 
> GCC: 3.3.5
> GLIBC: 2.3.5
> BINUTILS: 2.15

On gcc 3.3.x --with-float=soft does nothing.  If you are using a MIPS32 
ISA processor you can configure it with --target=mipsisa32[el]-linux to 
get soft float and MIPS32 ISA by default.

But even better would be to use gcc 3.4.x or 4.0.x where 
--with-float=soft works.  I would also recommend binutils 2.16.1 or 
above as there are some severe bugs in the mips linker in earlier versions.

David Daney.