Availability Macros question
Availability Macros question
- Subject: Availability Macros question
- From: Bill Cheeseman <email@hidden>
- Date: Tue, 10 Sep 2002 15:40:14 -0400
Can someone explain the AvailabilityMacros release note to me?
I think I understand the use of the upper-bound compiler flag, but the
lower-bound flag puzzles me.
The release note (supplemented by comments in the header file) says that
setting the lower-bound compiler flag for an application that will be run
only on, say, Mac OS X 10.1 or newer, will cause some system functions that
are available on newer systems but not older systems to be weak linked. So
what? What benefit does this confer on the application, or whatever?
Also, does setting this compiler flag cause the system to refuse to run the
application on an older system, or raise an alert? Or does it only control
compilation branches?
A similar question was asked two weeks ago but never answered.
--
Bill Cheeseman - email@hidden
Quechee Software, Quechee, Vermont, USA
http://www.quecheesoftware.com
The AppleScript Sourcebook -
http://www.AppleScriptSourcebook.com
Vermont Recipes -
http://www.stepwise.com/Articles/VermontRecipes
Croquet Club of Vermont -
http://members.valley.net/croquetvermont
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