re: Screensaver won't run on 10.6 even after porting to 64-bit
re: Screensaver won't run on 10.6 even after porting to 64-bit
- Subject: re: Screensaver won't run on 10.6 even after porting to 64-bit
- From: "Mr. George Warner" <email@hidden>
- Date: Sun, 11 Oct 2009 20:16:34 -0700
On Sun, 11 Oct 2009 15:02:22 -0400, Ben Haller <email@hidden
> wrote:
> Hi folks. So my screensaver broke on 10.6, along with everybody
> else's, and I'm told that's because it has to be compiled for the 64-
> bit architecture, because System Prefs is a 64-bit app on 10.6. So I
> set up a conditional compilation thing where it compiles three
versions:
> - ppc against the 10.4 SDK (deployment target 10.4), GCC 4.0
> - intel against the 10.4 SDK (deployment target 10.4), GCC 4.0
> - intel 64-bit against the 10.6 SDK (deployment target 10.6), GCC 4.2
> These settings are from a web page about how to get a screensaver
> to work on 10.6; I don't know why the GCC version needs to vary, for
> example. I'm just following orders. :->
> This all seems to work fine, after much fussing about with
> deprecated APIs and such. My screensaver now builds and links
without
> errors, and lipo gives me promising-looking output showing my three
> architectures. The screensaver runs fine on 10.5 intel; haven't
tried
> it on 10.4 or ppc, but I imagine it's fine there too.
> But on 10.6 I still get the same error from System Preferences.
> Opened Console and saw this:
> 10/11/09 2:51:18 PM ScreenSaverEngine[204] Error loading ...:
> dlopen(..., 265): no suitable image found. Did find:
> ...: GC capability mismatch
> 10/11/09 2:51:18 PM ScreenSaverEngine[204] ScreenSaverModules: can't
> get principalClass for ...
> So I guess System Preferences doesn't like my garbage collection
> setting (which is set to "Unsupported"). Do I really need to turn GC
> on to get my screensaver to work?? I haven't seen anything about
that
> elsewhere, so this catches me a bit off guard. I would have assumed
> that they would build it to be able to handle either style.
> Is there any way around this? Since I want my screensaver to still
> run on 10.4, this is more than a little inconvenient.
<http://developer.apple.com/mac/library/qa/qa2009/qa1666.html>
--
Enjoy,
George Warner,
Schizophrenic Optimization Scientist
Apple Developer Technical Support (DTS)
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