Re: stdout hanging on iOS 5.1
Re: stdout hanging on iOS 5.1
- Subject: Re: stdout hanging on iOS 5.1
- From: Jonas Maebe <email@hidden>
- Date: Wed, 14 Mar 2012 01:37:47 +0100
On 13 Mar 2012, at 23:08, Jens Alfke wrote:
> Through trial and error I’ve figured out that the problem has to do with writing to stdout (i.e. calling printf). I don’t do it myself, but some gnarly code I use (the Erlang runtime) does. As near as I can tell, on iOS 5.1 this is causing the thread to hang. The reason I know this is because if I call freopen to redirect stdout to a file (which I did in an attempt to capture any error messages that weren’t showing up in the console afterward), the problem goes away and the app launches.
>
> So is anyone aware of any problems using stdout in iOS apps?
Yes, there's a long thread about it on our bug tracker (although there someone reports that a plain printf() or write() from a pure Objective-C app does work for him): http://bugs.freepascal.org/view.php?id=21440 (it also has a weird crash report attached, with a crash in an "unknown thread" due to writing to stdout)
There's also this post from the MonoTouch guys, but I can't find the "iOS 5.1 guidelines" they refer to: http://blog.xamarin.com/2012/03/11/monotouch-and-ios-5-1/
I'd also be very interested in knowing what the deal is...
Jonas
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