crosstool-ng, armv7 and GCC-4.3.3

crosstool-ng, armv7 and GCC-4.3.3

[gisfri]

Hi,
I'm trying to build a toolchain for armv7-a with crosstool-ng 1.4.2

with GCC-4.3.3, but the process fails in compiler stage, with

Unknown 
arch used in --with-arch=armv7-a

(maybe because support for armv7 was 
added with GCC-4.4.0?)
But on ct-ng site I read of a successful build 
for this arch,
and also OpenEmbedded uses GCC-4.3.3 for armv7.
Is there 
somewhere a patch for adding armv7 support on GCC-4.3.3?

Regards,

Fabio

 

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Re: crosstool-ng, armv7 and GCC-4.3.3

[Martin Guy]

On 9/9/09, gisfri@tin.it <gisfri@tin.it> wrote:
>  I'm trying to build a toolchain for armv7-a with crosstool-ng 1.4.2
>  with GCC-4.3.3, but the process fails in compiler stage, with
>  Unknown arch used in --with-arch=armv7-a
>
>  (maybe because support for armv7 was
>  added with GCC-4.4.0?)

man gcc-4.3 says -march=name ... armv7, armv7-a, armv7-r, armv7-m
so it "should just work".

I suggest you dig down to find out exactly which script is emitting
that error message, and go from there

    M

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Re: crosstool-ng, armv7 and GCC-4.3.3

[Yann E. MORIN]

Fabio, Martin,
All,

On Friday 11 September 2009 12:25:21 Martin Guy wrote:
> On 9/9/09, gisfri@tin.it <gisfri@tin.it> wrote:
> >  I'm trying to build a toolchain for armv7-a with crosstool-ng 1.4.2
> >  with GCC-4.3.3, but the process fails in compiler stage, with
> >  Unknown arch used in --with-arch=armv7-a
> >  (maybe because support for armv7 was
> >  added with GCC-4.4.0?)
> 
> man gcc-4.3 says -march=name ... armv7, armv7-a, armv7-r, armv7-m
> so it "should just work".

Yes, it should. But it does not: ./configure does not accept the same
--with-arch= values as -march= accepts. :-(

> I suggest you dig down to find out exactly which script is emitting
> that error message, and go from there

Or use gcc-4.4, which knows about armv7-a at ./configure time.
This requires that you use crosstool-NG from the development tree.

Regards,
Yann E. MORIN.

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Re: crosstool-ng, armv7 and GCC-4.3.3

[gisfri]

>man gcc-4.3 says -march=name ... armv7, armv7-a, armv7-r, armv7-m
>so 
it "should just work".

>I suggest you dig down to find out exactly 
which script is emitting
>that error message, and go from there


After 
some trials I've added in gcc-4.3.3/gcc/config.gcc the armv7 option. 
Now it works.
Thanks.

Fabio

 

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