Re: x86_64 issues using crosstool-0.28-rc31

[Daniel Kegel <dank at kegel dot com>]

Andrew Walrond wrote:
> Firstly, Hi! and thanks for a great tool!
>
> I've successfully built 
> 	gcc-3.3.4-glibc-2.3.2
> and
> 	gcc-3.4.0-glibc-2.3.2
> x86_64 toolchains on an opteron system running a 32bit i686 linux distro.
>
> I used the toolchain to build a 64bit kernel for the system, using 
>
> 	make ARCH=x86_64 CROSS_COMPILE=x86_64-unknown-linux-gnu-
>
> which works well except for these assertions:
>
>   LD      .tmp_vmlinux1
> x86_64-unknown-linux-gnu-ld: BFD 2.15 assertion 
> fail /home/andrew/crosstool-0.28-rc31/build/x86_64-unknown-linux-gnu/gcc-3.4.0-glibc-2.3.2/binutils-2.15/bfd/linker.c:619

A little google searching finds
http://developer.osdl.org/dev/plm/cross_compile/README.x86_64
which suggests downgrading to 2.14.90.0.8.
(Same problem showed up in http://lists.linux-wlan.com/pipermail/linux-wlan-user/2004-June/012626.html)

> The kernel build otherwise seems to complete without problems, and seems to 
> boot fine. Should I be worried?

Oh, probably :-)

> Secondly, FYI, I have found that if I try to build other toolchains while 
> running the 64bit kernel, but with the same 32bit distro, the build fails 
> while configuring glibc, like this
>
> checking for long double... yes
> checking size of long double... configure: error: cannot compute sizeof (long double), 77
> See `config.log' for more details.
>
> I've double checked; It works fine when I'm running a 32bit kernel.

I've run into this before.  Were you using a recent crosstool?  I think
the patch
http://kegel.com/crosstool/crosstool-0.28-rc26/patches/glibc-2.3.2/glibc-2.3.2-cross-2.patch
should have helped.
(see also e.g. http://lists.gnu.org/archive/html/autoconf/2004-05/msg00087.html)
- Dan

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