macOS XCode and LLVM

[Tex-Twil]

Hi,
I was reading the Ars Technica review of Snow Leopard and I have a question about the LVVM and Clang part. In the review they say that the LLVM compiler should report warning/errors more efficiently in xcode as gcc does.

I wanted to reproduce this:

So I coded that same function in xcode, set the compiler to LLVM GCC 4.2 in the project preferences, build it but I don't see the same result.

What am I doing wrong ?

Thanks,
Tex

 

[gnasher729]

That message doesn't come from the compiler, but from the static analyser.

 

[GorillaPaws]

That message doesn't come from the compiler, but from the static analyser.

In other words, don't choose "Build and Run", but instead use "Build and Analyze" from the build menu.

 

[Tex-Twil]

ok, now I see the message but not the fancy arrows

 

[Detrius]

ok, now I see the message but not the fancy arrows

As you said, you're using LLVM GCC 4.2. You need to be using Clang LLVM 1.0, which is what the article is about.

 

[Tex-Twil]

As you said, you're using LLVM GCC 4.2. You need to be using Clang LLVM 1.0, which is what the article is about.

it's not there even with LLVM 1.0

 

[rossipoo]

You must click on the error message for the arrows to appear. And the Analyzer doesn't run itself (unless you specify this in your build settings, which is recommended), so you do need to click Analyze under the Biild menu.

 

[Tex-Twil]

You must click on the error message for the arrows to appear.

oh that was the mistake. Thanks

EDIT: ... ouah this is very cool !