[cfe-dev] XCode 4.3 and Clang vs AppCode static analysis question.

Jordan Rose jediknil at belkadan.com
Tue Apr 24 08:22:21 PDT 2012

Hello, Seamus. Clang does have support for this check, but it's disabled by default (possibly because of http://llvm.org/bugs/show_bug.cgi?id=8838 ).

To run the analyzer from the command line, see the instructions at http://clang-analyzer.llvm.org/scan-build.html . You can use "-enable-checker experimental.osx.cocoa.Dealloc" to see if it would have caught your problems.

I'm not sure if there are immediate plans to re-enable this check, but your e-mail demonstrates there is clearly interest in it. Ted or Anna might have something more definite to say on this.


On Apr 24, 2012, at 10:31, Seamus McGowan wrote:

> Hello,
> Please bear with me, I'm new to iOS development and Objective-C.
> We have our XCode project setup to perform static analysis and have never seen the analyzer generate a message to date. I use AppCode to edit my code and I decided to evaluate its project level static analysis.
> AppCode picked up 54 ivars that were not properly de-allocated. At least 50 of these were legit, (we nailed a couple memory leaks in fact.)
> Should Clang have identified these?
> I have attempted to run Clang from the command line to see if its an issue with the XCode project but encounter this error:
> 	clang: error: unsupported option '--serialize-diagnostics'
> (I'm trying to find out what this option is and where its set in the project.)
> NB, This project was originally started in XCode 4 , pre-ARC, and I have no idea if the project required tweaks or fixes in order to build.
> Any pointers in understanding the capabilities of clang and how to work with it properly would be appreciated.
> Seamus
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