Re: ct-ng 1.4.2: problem in creating x86_64 toolchain

["Yann E. MORIN" <yann dot morin dot 1998 at anciens dot enib dot fr>]

Zvi, all,

On Friday 30 October 2009 05:20:10 Zvi Vered wrote:
> I used ct-ng-1.4.2 to build a toolchain for x86-64.
[--SNIP--]
> The toolchain was build OK. When I ran "x86_64-unknown-linux-gnu --v" I got:
> Using built-in specs.
> Target: x86_64-unknown-linux-gnu
> Configured with:
> /home/zvivered/GNU/ct-ng-1.4.2/working/src/gcc-4.3.2/configure
> --build=i386-build_redhat-linux-gnu --host=i386-build_redhat-linux-gnu
> --target=x86_64-unknown-linux-gnu

So, your host is an x86, not an x86_64, right?

> But when I tried: ldd ld-2.9.so

I suppose you're talking about the ld-2.9.so in the sysroot of the
toolchain, right?

> I got: not a dynamic executable

That's what I would expect: ldd tries to _run_ the executable you pass
as argument. Because your host is x86, and the ld-2.9.so was built for
x86_64, it won't run on the host!

Run "file ld-2.9.so" : what does it tell you?

You should use "x86_64-unknown-linux-gnu-readelf -d" and look at the
'NEEDED' entries.

> I also tried ldd myapp.out which is a very simple executable I created
> and got the same response.

Ditto.

> Then I looked at build.log and saw some errors starting from line 25150 :
> [ALL  ]    objdump: init-first.o: File format not recognized
> What is the reason for those errors ?

glibc tries to use the host objdump (x86) on a target .o (x86_64).
It fails, which is understandable... glibc is wrong, here :-(

> By the way, ct-ng is a great tool !!!.
> I built a toolchain for i686 and it works great.

Thanks!

Regards,
Yann E. MORIN.


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