On Wed, 23 Sep 2009 03:39:23 -0700 (PDT), Chris Idou <idou...@yahoo.com> said: >From: Ken Thomases <k...@codeweavers.com> > >>Don't test whether you're running on Leopard. > >Well I'm thinking of a particular bug on Leopard with MDItemCreate where you have to choose between your program crashing and leaking memory.
Yes, Ken's advice doesn't make sense to me here. Certainly there will be situations where you want to use Gestalt to test what system you're running on. I've just started the process of updating my various little Tiger-and-before apps for Snow Leopard. Dealing with the problem of whether to run on Leopard too has been tricky. I was hoping that setting my deployment target to 10.5 (and base to 10.6) would mean that on Snow Leopard I would magically crash if the app was destined to crash on Leopard, but no such luck. :) The only way is to copy the built app over to a Leopard machine, run it there, see what happens, and then try to figure out what the heck it means. You can spend hours puzzling over a single line of code (at least, I can). REALbasic has "remote debugging", e.g. it lets you build and debug on a Mac while the app (with all its breakpoints etc.) is running on a Windows machine, so you can test your cross-platform compatibility; it would be really cool if Xcode had something like that. Plus of course in addition to systems there are architectures to take account of. At a point where everything was fine on Snow Leopard, at the same time, on Leopard I was crashing on startup in 64-bit, running fine in 32-bit, and running very weirdly in Rosetta. It took a while to get that sorted out. In the end I used a combination of Gestalt (what system are we running on?) and #if __ppc__ (what architecture are we building for?) to tweak the app's behavior as needed. Of course you *could* just say "This app is Snow Leopard / Intel / 64-bit only," and save yourself a lot of work. :) m. -- matt neuburg, phd = m...@tidbits.com, <http://www.tidbits.com/matt/> A fool + a tool + an autorelease pool = cool! AppleScript: the Definitive Guide - Second Edition! http://www.tidbits.com/matt/default.html#applescriptthings _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
