[LLVMdev] [PATCH]: enable multilib build on x86_64-apple-darwin

Jack Howarth
Wed, 26 Aug 2009 21:11:04 -0000

Any chance that we could get r80071 applied to llvm-gcc-2.4 2.6
branch in about a week? As Mike said this change should be
very safe.
             Jack

On Wed, Aug 26, 2009 at 12:48:15AM -0700, Eric Christopher
wrote:
>
> On Aug 25, 2009, at 9:57 PM, Chris Lattner wrote:
>
> >
> > On Aug 25, 2009, at 2:33 PM, Mike Stump wrote:
> >
> >> On Aug 23, 2009, at 11:36 AM, Jack Howarth wrote:
> >>> Current llvm-gcc-4.2 for trunk and the 2.6 release
> >>> is unable to build the i386 multilib for the
> >>> x86_64-apple-darwin target. The attached patch provides
> >>> this support. Can we get this into the 2.6 release
> >>> and trunk?
> >>
> >> This is fine.  I don't have a rw llvm-gcc tree, some else want
to
> >> check it in?  For 2.6, that's be someone else's call, for
what it's
> >> worth, this should be fairly safe.
> >
> > I applied this as r80071.  However, I don't understand what this
> > does.  I'm able to build a working i386/x86-64 compiler on darwin
> > without this, what exactly does this fix?  What exactly is an
"i386
> > multilib" and why do we care? :)
>
> If you build a native 64-bit darwin compiler (host/target are x86_64-
> darwin) this will give you a -m32 multilib that will enable you to
> target i386. Otherwise you have to build a 32-bit compiler that has a
> 64-bit multilib.
>
> -eric
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