XCode and LLVM

Discussion in 'Mac Programming' started by Tex-Twil, Dec 12, 2009.

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  1. Tex-Twil, Dec 12, 2009

    Tex-Twil macrumors 68020

    Tex-Twil

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    #1
    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:
    [​IMG]

    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
     
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  2. gnasher729, Dec 12, 2009

    gnasher729 macrumors P6

    gnasher729

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    #2
    That message doesn't come from the compiler, but from the static analyser.
     
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  3. GorillaPaws, Dec 12, 2009

    GorillaPaws macrumors 6502a

    GorillaPaws

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    #3
    In other words, don't choose "Build and Run", but instead use "Build and Analyze" from the build menu.
     
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  4. Tex-Twil, Dec 12, 2009

    Tex-Twil thread starter macrumors 68020

    Tex-Twil

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    #4
    ok, now I see the message but not the fancy arrows
     
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  5. Detrius, Dec 12, 2009

    Detrius macrumors 68000

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    #5
    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.
     
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  6. Tex-Twil, Dec 12, 2009

    Tex-Twil thread starter macrumors 68020

    Tex-Twil

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    #6
    it's not there even with LLVM 1.0
     
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  7. rossipoo, Dec 12, 2009

    rossipoo macrumors regular

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    #7
    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.
     
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  8. Tex-Twil, Dec 12, 2009

    Tex-Twil thread starter macrumors 68020

    Tex-Twil

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    #8
    oh that was the mistake. Thanks :)

    EDIT: ... ouah this is very cool !
     
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