Re: [PATCH] Add cross compile to top level configuration file

Jerone Young
2007-10-16T19:51:49Z

On Tue, 2007-10-16 at 09:59 -0500, Anthony Liguori wrote:
> Jerone Young wrote:
> > On Mon, 2007-10-15 at 15:13 -0500, Anthony Liguori wrote:
> >
> >
> >>> +fi
> >>> +
> >>> +qemudir=`pwd`/qemu
> >>> +
> >>> +#configure user dir
> >>> +(cd user; ./configure --prefix="$prefix" --kerneldir="$libkvm_kerneldir" \
> >>> + $user_opts --arch="$arch")
> >>> +(cd qemu; ./configure --target-list=$target_exec \
> >>> --disable-kqemu --extra-cflags="-I $PWD/../user" \
> >>> --extra-ldflags="-L $PWD/../user" \
> >>> --enable-kvm --kernel-path="$libkvm_kerneldir" \
> >>> - --enable-alsa \
> >>> ${disable_gcc_check:+"--disable-gcc-check"} \
> >>> - --prefix="$prefix"
> >>> + --prefix="$prefix" \
> >>> + $qemu_opts --cpu="$arch"
> >>>
> >>>
> >> I don't think this is right. You're using two different --cpu options
> >> for i386 and x86_64. There really shouldn't be a --cpu option at all
> >> for x86.
> >>
> >
> > So the --cpu option is actually a hidden option in qemu & is not on the
> > qemu help page .. who know why it isn't but the it's in the code.
> >
> > It makes since though that if you are going to specify cross-prefix=
> > then there is little reason to specify the cpu on the qemu line. As it
> > should detect everything from cross compiler.
> >
> > I'll test this out and send a new patch with the 2 changes.
> >
>
> So, instead of doing the funky $qemu_opts thing, why not just do:
>
> ${cross_prefix:+"--cross-prefix=${cross_prefix} --cpu=${arch}"}

Well you could but what I need to is satisfy the situation that if you
have --qemu-cc specified that it not use it. I'm not sure how you do
this in one line in bash. So I have

if [[ -z $cross_prefix ]]; then
qemu_opts+=" --cc=$cc"
else
qemu_opts+=" --cross-prefix=$cross_prefix"
fi

Also after this options are added to $qemu_opts based on what
architecture you are compiling for. For now you only see x86-64 & i386.
But this is about to change .. if I can ever get this patch in :-)

Also it becomes even more complicated with the next version of the patch
I'll be sending out in out.

>
> Regards,
>
> Anthony Liguori
>
>
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