[Qt-interest] Distributing Qt apps on Mac

[Reaves, Timothy]

Yes, this has gotten a bit confusing.

For your framework question, there is plenty of information out their
answering your question; search for it.

For the Carbon/Cocoa, Cocoa is going to be better, but blocks PPC & < 10.5
support. The Carbon version runs on both, but is 32bit only, and is dead (as
Apple no longer does Carbon).

If you need to support both PPC & Intel, an 10.4, 10.5, & 10.6, then you
will need to compile your own version of Qt, and distribute that, and have
at least two different installers (for <10.6 & >= 10.6).



On Fri, Apr 1, 2011 at 2:04 PM, David Ching <dc at dcsoft.com> wrote:

> Hello,
>
>
>
> I have experience with Qt on Windows but am new to Qt on Mac.  I have some
> basic questions for bulding and deploying on Mac:
>
>
>
> 1.    There are two versions of Qt for Mac, Carbon and Cocoa.  Already,
> this is a painful decision point for me.  In your experience, is supporting
> Cocoa only (which I believe is Leopard, Snow Leopard, etc.) enough?
>
> 2.    I installed Qt 4.7.1 Carbon SDK onto my Snow Leopard MacBook, built
> my app, ran ‘macdeployqt’.  Using “otool –L”, this showed that the Qt
> “frameworks” (and not “.dylibs”) were stored into my .app bundle.  I am
> confused about this whole “framework” concept --- how are these
> different/better than simple .dylibs?
>
> 3.    The Qt frameworks that were put into my app bundle apparently were
> built as “universal binaries” meaning they have both PPC and Intel binaries
> in them.  Do many people still use PowerPC Mac’s, can I rebuild the
> frameworks without PowerPC and reduce the size?
>
> 4.    The app built in #2 resulted in a successful deployment onto Snow
> Leopard, but when run on Leopard, the error in Console shows:
>
>
>
> dyld: lazy symbol binding failed: Symbol not found:
> __ZSt16__ostream_insertIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_PKS3_i
>
> Referenced from: /Applications/MyApp.app/Contents/MacOS/MyApp
>
> Expected in: /usr/lib/libstdc++.6.dylib
>
>
>
>             This is the same error Qt got in their own Linguist app:
> http://bugreports.qt.nokia.com/browse/QTBUG-13943
>
>
>
>             But they declined to fix it (even though the fix version is
> listed as 4.7.2, I don’t believe it was fixed there, since the last comment
> said it would not be fixed).  I can see Nokia expecting developers to run
> Snow Leopard, but now the same error is happening in my own app, and I can’t
> expect my users to be running Snow Leopard!
>
>
>
>             I must be missing something here, in my ignorance of Mac
> things.  Could someone help me understand Carbon vs. Cocoa, Frameworks vs.
> dylibs, PowerPC support or not, and most of all:  how to be able to build my
> Qt app so I can distribute it on Leopard.
>
>
>
> Thanks,
> David
>
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>
>
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