Trouble with iphone 3.0 SDK (beta 3)

[llvmbot]

Bugzilla Link	4215
Resolution	FIXED
Resolved on	Mar 06, 2010 13:59
Version	unspecified
OS	All
Reporter	LLVM Bugzilla Contributor
CC	@lattner,@tkremenek

Extended Description

I've made a default window based app for iphone with xcode 3.1.3, no modifications, then I run the command:

scan-build -k -V xcodebuild -configuration Debug -sdk iphonesimulator3.0

which is using checker-0.204, and I get the following results:

/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILocalizedIndexedCollation.h:11: error: syntax error before ‘AT_NAME’ token
/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILocalizedIndexedCollation.h:19: error: syntax error before ‘}’ token
/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILocalizedIndexedCollation.h:21: fatal error: method definition not in @​implementation context

It looks like it doesn't like something in the standard header files.

I hope that's useful info!
--RKP

[llvmbot]

assigned to @tkremenek

[tkremenek]

I've made a default window based app for iphone with xcode 3.1.3, no
modifications, then I run the command:

scan-build -k -V xcodebuild -configuration Debug -sdk iphonesimulator3.0

which is using checker-0.204, and I get the following results:

/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILocalizedIndexedCollation.h:11:
error: syntax error before ‘AT_NAME’ token
/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILocalizedIndexedCollation.h:19:
error: syntax error before ‘}’ token
/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.0.sdk/System/Library/Frameworks/UIKit.framework/Headers/UILocalizedIndexedCollation.h:21:
fatal error: method definition not in @​implementation context

It looks like it doesn't like something in the standard header files.

I hope that's useful info!
--RKP

I was able to reproduce this. These errors are actually coming from GCC, not Clang.

Here is what is happening:

1. On Leopard, the default compiler is gcc-4.0:

$ which gcc --version
i686-apple-darwin9-gcc-4.0.1 ...

2. The problem is that the iPhone SDK 3.0 uses gcc 4.2. If you just run xcodebuild without the scan-build prefix, you will see:

CompileC ... com.apple.compilers.gcc.4.2

3. The way scan-build runs the analyzer is that it overrides the environment variable CC to be 'ccc-analyzer', and then 'ccc-analyzer' calls 'gcc' (which in this case is gcc-4.0) to do your regular compilation and 'clang-cc' to do the static analysis.

Problem is that you are now using the wrong compiler for your compilation, hence the errors.

This can be solved via the '--use-cc' option:

$ scan-build --use-cc=gcc-4.2 xcodebuild -configuration Debug -sdk iphonesimulator3.0

The problem is that we would like this work correctly without the user having to do this step. Ideally, if scan-build actually did real process interposition, it could intercept whatever version of GCC that xcodebuilder (or whatever build system) decided to use and figure that out on the fly. This is something we haven't had the opportunity to implement yet.

In the meantime, I can easily add a hack to scan-build to implicitly set the --use-cc option to gcc-4.2 when one specifies '-sdk iphonesimulator3.0'.

[lattner]

Please note that llvm.org bugzilla is an inappropriate place to discuss NDA's software releases, please file a bug at bugreporter.apple.com

[tkremenek]

Please note that llvm.org bugzilla is an inappropriate place to discuss NDA's
software releases, please file a bug at bugreporter.apple.com

Indeed. The issue in scan-build is now fixed:

http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20090511/017311.html

Will be in checker-0.207.