Re: powerpc gcc option -many passed to assembler

[Khem Raj <raj dot khem at gmail dot com>]

On 3/31/2011 6:13 AM, Titus von Boxberg wrote:
> Hi,
>
> just in case someone is interested:
> Calling as with option -many is hardcoded in gcc.
>
> A colleague found those links which might be helpful
> for seeing the "reasoning" behind:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21091
> http://gcc.gnu.org/ml/gcc-patches/2004-05/msg01244.html
> http://gcc.gnu.org/ml/gcc-patches/2004-05/msg01247.html
> http://sources.redhat.com/ml/binutils/2004-05/msg00376.html
> http://sources.redhat.com/ml/binutils/2004-05/msg00357.html
>
> The problem I had was that the compiler/assemler accepts
> e.g. dcbzl for an e500v2 which leads to a SIGILL.
>
> The solution for me is up to now
> - to patch away -many in gcc
> - to allow sync / eieio (in addition to equivalent msync/mbar) in as
>    for e500 because otherwise you cannot compile almost nothing
>    of the tool chain.
>
> Aditionally, in binutils 2.20 there is the mistake that
> an e500 was believed to be an e500mc (but this has apparently
> been corrected in 2.21).
>
> Regards
> Titus
>
> Am Di, 22.03.2011, 14:49 schrieb Titus von Boxberg:
> > Hi,
> >
> > I'm using ct-ng generated tool chains (gcc 4.5.1, binutils 2.20)
> > for PowerPCs, a 603e and a e500v2.
> >
> > Both compilers pass -many to the assembler which disables
> > checking the assembly code for cpu specific instructions
> > (or better, for instructions the cpu does NOT provide).
> >
> > Does someone know what the reasoning is and if there's
> > some knob to turn it off?

Whats your target ? try to use powerpc-linux-gnuspe see if that helps
otherwise you can also add --with-arch option to gcc configure otherwise
what happens if you use -mcpu=<cpu> option ?

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