Re: can't build x86-32 libc on x86-64 with mainline binutils

["H. J. Lu" <hjl@lucon.org>]

On Thu, Mar 02, 2006 at 03:06:57PM -0300, Alexandre Oliva wrote:
> Am I the only one having trouble assembling
> glibc/sysdeps/i386/fpu/e_atanh.S with -m32 with binutils mainline
> toplevel-bootstrapped along with GCC trunk on x86_64?  I've hit this
> for several days now, maybe several weeks? (time flies)
> 
> The assembler fails the sanity check for carry == 0 on
> gas/atof-generic.c:419 on line 40 of the preprocessed asm file.  In
> fact, assembling that line by itself produces the same error.
> 
> Here's how I configured the toolchain:
> 
> ../configure   amd64-linux-gnu --enable-languages=all
> 
> and here's how I configured glibc:
> 
> ../src/configure '--prefix=/usr' '--enable-add-ons=nptl' \
>   '--without-cvs' '--with-tls' '--with-headers=/usr/include' \
>   '--build=i686-pc-linux-gnu' 'CC=gcc -m32 -march=i686 -U__i686' \
>   'CXX=g++ -m32 -march=i686 -U__i686'
> 
> (the ugly -U__i686 was introduced months ago; IIRC without it we'd
> fail to assemble the GOT register set up routines that have __i686 in
> their names in such a way that the preprocessor would expand __i686 to
> 1.  I haven't tried without it, I've only just realized it was still
> there)

So mainline assembler doesn't work for you. Can you open a bug report
with a small testcase if you haven't done so? I will look into it.


H.J.