[tex-live] use of x86_64-darwin only in mactex 2010

Yan Zhou zhouyan1014 at gmail.com
Tue Jun 22 00:23:08 CEST 2010

I have just one question, how does tlmgr determine the arch?

When I tried to remove universal-darwin (i know it is not necessary, but i
just tried), tlmgr shows,
You are running on arch universal-darwin, you cannot remove that one!
I am running SL on an i7 macbook pro, with 64-bit kernel. So on which
machines, tlmgr will detect it to be x86_64-darwin instead of
universal-darwin? My guess is Mac Pro, which runs 64bit kernel by default.

On Mon, Jun 21, 2010 at 5:02 PM, Richard Koch <koch at math.uoregon.edu> wrote:

> I make the Mac binaries.
> The 32 bit binaries work fine on 64 bit machines. Consequently, we have the
> luxury of
> compiling 64 bit binaries on the very latest operating system. Thus
> x86_64-darwin is
> compiled on Snow Leopard and does not work on 64 bit Leopard machines.
> It isn't possible to add these binaries to universal-darwin because if we
> did, 64 bit
> machines running Leopard would try to run them and crash.
> When these binaries were created, Karl asked me whether they should be the
> default
> binaries on 64-bit Snow Leopard machines. I said "no," and I hope we stick
> with
> that decision. Tests show that the speed increase with 64 bit binaries is
> very minor.
> Last year we supplied 64 bit binaries "on the side, unofficially." I wanted
> them in TeX
> Live this year so tlmgr would update links and scripts in the 64 bit
> directory when it
> updated similar files in other distributions. Most users won't notice the
> difference between
> 32 bit binaries and 64 bit binaries, so we're just trying to accommodate a
> few folks
> who care. Let's not complicate the jobs of the
> TeX Live maintainers by making them do something complicated with the Mac
> portion of their scripts.
> Dick Koch
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