Re: MIPS SF toolchain

[David Daney <ddaney@avtrex.com>]

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.