PowerPC ld64 on Snow Leopard (Was: depends_run should ignore +/- universal?!)

[Jeremy Huddleston Sequoia]

> On Jan 22, 2015, at 22:35, Lawrence Velázquez <larryv at macports.org> wrote:
> 
> On Jan 23, 2015, at 1:33 AM, Lawrence Velázquez <larryv at macports.org> wrote:
> 
>> My last change dropped ld64 +universal to v127.2
> 
> Rather, it changed the version if a PowerPC build were requested in any way. So that's probably even worse.

No, that's expected.  If ppc is desirer, we should have 127.2.

I think the best solution would probably be similar to the perl port.  We should maybe have ld64-97, ld64-127, ld64-136, and ld64-latest subports and have the ld64 port depends_run on the subport that should be selected.  The ld64 subports should all be simultaneously-installable and $prefix/bin/ld should be a symlink to the "preferred" one.

That will also make it easier to bootstrap to use 136 to bootstrap 236 with Xcode 3.2.

--Jeremy

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