At 3:19 PM -0700 8/8/08, Chris Hanson wrote:
On Aug 7, 2008, at 7:07 PM, Peter N Lewis wrote:
At 8:24 AM -0700 7/8/08, Chris Hanson wrote:
If you build with the Mac OS X 10.5 SDK, you should be able to use
NSMakeCollectable since it's declared as an inline function.
The earliest release of Mac OS X you're targeting is a function of
the Mac OS X Deployment Target build setting, not the SDK.
That's true, but its not safe to do so.
For example, that will allow kCGBlendModeCopy to be used, even
though its not available in 10.4.
It is as safe as it ever was. You just need to put in checks for
what OS you're running on around places you use functionality from
the newer release(s).
My point is, the compiler will not tell you that you are using a
constant like kCGBlendModeCopy that is not supported in 10.4 if you
use the 10.5 SDK with Deployment Target 10.4. On the other hand, the
compiler will tell you if you try to use kCGBlendModeCopy with the
10.4 SDK because it's not defined. You can still manually define it
and use it, but you have to go out of your way to do it - as you
should if you want your code to work on 10.4 first time instead of
after a lot of beta testing.
So I'll stick with the 10.4 SDK until I really have to use something
difficult from 10.5, by which time I will hopefully be able to drop
10.4 entirely.
Thanks,
Peter.
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