plans for 64bit support

[Daniel Oberhoff]

On Dec 12, 2007 1:43 PM, Ryan Schmidt <ryandesign at macports.org> wrote:

>
> On Dec 12, 2007, at 06:28, Daniel Oberhoff wrote:
>
> >> > a) I could prevent this (i.e. have it build 32bit as before)
> >> > b) If I could have two completely independent macports repos on my
> >> > disk, one built 32bit and one 64bit. This would be ideal since most
> >> > everyday stuff is 32bit, and only some libs and stuiff are needed
> >> > for 64. I would go as far as saying this latter option would be the
> >> > best solution (less hassle than doing universal builds and better
> >> > controllable),
> >> >
> >> > for the 32/64 bit versions I would really like this supported in
> >> > macports properly, and not have to fiddle with build flags... I
> >> > would like a repo-constant switch for this. I.e. some repo (I refer
> >> > to repo as a local macports install tree, i.e. what is usually
> >> > under /opt/local) would be set up as 64bit and always be 64bit from
> >> > there on (i.e. update, install and all when on this repo do 64bit
> >> > builds). And another would be 32bit. One could do the same for ppc.
> >> > I think real universal binaries are only ever needed for
> >> > distribution, and then one can always go and lipo things by hand.
> >> >
> >> > So is this kind of repo-based architecture selection possible. And
> >> > the installation of multiple macports repos? If not I would even
> >> > help make it possible if someone gets me started :).
> >>
> >> By default the Apple compilers will produce 32 bit binaries, so if
> >> you don't do anything, you'll end up with 32 bit ppc or i386
> >> binaries. We currently don't have a switch to enable 64 bit binaries,
> >> so no: "just" installing MacPorts a 2nd time isn't getting you
> >> anywhere near there.
> >> I'd recommend (for now) to hack the portconfigure.tcl [1] file and
> >> replace "-arch i386 -arch ppc" with "-arch i386 -arch x86_64", then
> >> build the stuff you need with "+universal".
> >> For more awesomeness to happen sooner, I'd advice to start hacking
> >> port(1) with us... ;)
> >
> > Hehe :). Well, I would first like to know if and how I can install
> > a second macports tree.
>
> Documented:
>
> http://guide.macports.org/#installing.source.multiple
>

Thanks, rtfm I guess :).


>
> > As I would prefer that over building inversals. Once I get there I
> > will see how I can force one tree to build 64bit and report on what
> > I come up with. But I might also play with that universal hack...if
> > it is that easy, why can't it be automated?
>
> Are you asking: why haven't we dealt with 4-way universal binaries or
> any kind of 64-bit support before? I don't think anybody's asked for
> it before.
>
>
>
Sure, Leopard is quite new and all. Hmm, but I remember someone said its
really complicated...anyhow, I will probably try both ways sometime this
week and report on my findings.

Best

Daniel
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