Clang scan-build won't work with Xcode 4.2 LLVM 3.0 build configuration

Question

I've installed Xcode 4.2 final version to be able to compile for iOS 5.

We are using Jenkins for CI and run Clang scan-build from the llvm.org project page. (Version 258) The project is configured to use LLVM 3.0 (which is default since Xcode 4.2). Now every time I try to run scan-build do I get following error:

CompileC build/Cortado.build/Debug-iphonesimulator/Cortado.build/Objects-normal/i386/TPContentDetailViewController_iPad.o Classes/iPad/TPContentDetailViewController_iPad.m normal i386 objective-c com.apple.compilers.llvm.clang.1_0.compiler
    cd "/Volumes/Sources/Starteam - Main View/Workplace/Cortado"
    setenv LANG en_US.US-ASCII
    setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/Applications/android-sdk-mac_x86/android-ndk-r6b:/Applications/android-sdk-mac_x86/platform-tools:/Applications/android-sdk-mac_x86/tools:/Volumes/Sources/Starteam - Main View/Tools:/Volumes/Sources/Tools:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin"
    /Users/thwee/Downloads/checker-258/libexec/ccc-analyzer -x objective-c -arch i386 -fmessage-length=0 -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -Wno-trigraphs -fpascal-strings -O0 -Wreturn-type -Wparentheses -Wswitch -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-shorten-64-to-32 -DDEBUG -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -fexceptions -fasm-blocks -fprofile-arcs -ftest-coverage -mmacosx-version-min=10.6 -gdwarf-2 -Wno-sign-conversion -fobjc-abi-version=2 -fobjc-legacy-dispatch "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -D__IPHONE_OS_VERSION_MIN_REQUIRED=40100 -iquote "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-generated-files.hmap" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-own-target-headers.hmap" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-all-target-headers.hmap" -iquote "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-project-headers.hmap" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Debug-iphonesimulator/include" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/DerivedSources/i386" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/DerivedSources" "-F/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Debug-iphonesimulator" -include "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/Cortado_Prefix.pch" -MMD -MT dependencies -MF "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Objects-normal/i386/TPContentDetailViewController_iPad.d" -c "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/Classes/iPad/TPContentDetailViewController_iPad.m" -o "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Objects-normal/i386/TPContentDetailViewController_iPad.o"
cc1obj: error: unrecognized command line option "-Wno-sign-conversion"
cc1obj: error: unrecognized command line option "-fdiagnostics-print-source-range-info"
cc1obj: error: unrecognized command line option "-fdiagnostics-show-category=id"
cc1obj: error: unrecognized command line option "-fdiagnostics-parseable-fixits"

If I use the static code analyze of Xcode self I get following output which works without issues:

CompileC build/Cortado.build/Debug-iphonesimulator/Cortado.build/Objects-normal/i386/TPInfoCell.o Classes/TPInfoCell.m normal i386 objective-c com.apple.compilers.llvm.clang.1_0.compiler
    cd "/Volumes/Sources/Starteam - Main View/Workplace/Cortado"
    setenv LANG en_US.US-ASCII
    setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang -x objective-c -arch i386 -fmessage-length=0 -fdiagnostics-print-source-range-info -fdiagnostics-show-category=id -fdiagnostics-parseable-fixits -Wno-trigraphs -fpascal-strings -O0 -Wreturn-type -Wparentheses -Wswitch -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-shorten-64-to-32 -DDEBUG -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -fexceptions -fasm-blocks -fprofile-arcs -ftest-coverage -mmacosx-version-min=10.6 -gdwarf-2 -Wno-sign-conversion -fobjc-abi-version=2 -fobjc-legacy-dispatch "-DIBOutlet=__attribute__((iboutlet))" "-DIBOutletCollection(ClassName)=__attribute__((iboutletcollection(ClassName)))" "-DIBAction=void)__attribute__((ibaction)" -D__IPHONE_OS_VERSION_MIN_REQUIRED=40100 -iquote "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-generated-files.hmap" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-own-target-headers.hmap" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-all-target-headers.hmap" -iquote "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Cortado-project-headers.hmap" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Debug-iphonesimulator/include" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/DerivedSources/i386" "-I/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/DerivedSources" "-F/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Debug-iphonesimulator" -include /var/folders/m7/1lwxj7113xb17b8k635bn0200000gn/C/com.apple.Xcode.501/SharedPrecompiledHeaders/Cortado_Prefix-curmpedgpezkvsgarfuwvmdrauwa/Cortado_Prefix.pch -MMD -MT dependencies -MF "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Objects-normal/i386/TPInfoCell.d" -c "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/Classes/TPInfoCell.m" -o "/Volumes/Sources/Starteam - Main View/Workplace/Cortado/build/Cortado.build/Debug-iphonesimulator/Cortado.build/Objects-normal/i386/TPInfoCell.o"

Has someone an idea what I can do to get scan-build running again without disabling LLVM 3.0 use?!

Answer 1

I raised a bug with Apple about this and other issues (like scan-build not recognising ARC'd code).

The fix is to install checker-260, see http://clang-analyzer.llvm.org/release_notes.html plus this modification to ccc-analyzer - http://llvm.org/viewvc/llvm-project?view=rev&revision=149094. Hopefully the fix to ccc-analyzer will be incorporated into a future release of scan-build.

Using this latest version of scan-build will avoid you having to make the modifications to scan-build described in the previous answer.

Answer 2

It looks like scan-build is deciding to use llvm-gcc, which is confusing Xcode because it is expecting to be running clang. Probably just a bug in scan-build; I'd suggest sending an email to cfe-dev.

Answer 3

Found a solution to have checker-258 build :

Pass this param to scan-build : --use-cc=`which clang`

Then to make it builds by jenkins and the scan-build plugin... it's a little trickier :

Move scan-build to scan-build.bin, and then make scan-build be a script :

#!/bin/sh

dir=$(dirname $0)
$dir/scan-build.bin --use-cc=`which clang` $@

The result of which clang is : /usr/bin/clang

Edit: worked for two projects, one with LLVM 3.0, the other with llvm-gcc4.2.