[cfe-dev] Using clang static analyzer on linux with Objective C for arm-apple-darwin9-gcc

[Ted Kremenek]

On May 27, 2009, at 10:01 PM, Eli Friedman wrote:

>> I have an Objective C project which compiles fine under Fedora 8 on  
>> x86
>> gcc-4.2.1 cross compiler for arm-apple-darwin9.
>>
>> When I use scan-build with ccc-analyzer it fails to compile. The  
>> first
>> compiler error is
>> /Projects/iphone/toolchain/toolchain/sys/usr/include/Foundation/ 
>> NSObject.h:105:
>> error: expected ‘;’ before ‘__attribute__’
>>
>> I can provide more info, please let me know what kind of info is  
>> needed.
>
> Is that error coming out of gcc?  (The complete console output might
> be useful here.)  If it is, it's probably a bug in the scan-build
> script.  Also, if you could show a few lines around the error, it
> might be useful for figuring out what exactly the error is complaining
> about.

I don't think it's a scan-build bug, but just a limitation of what the  
scan-build script can do.  It doesn't know what version of gcc you  
want to use, so it just uses the system default gcc.  It sounds like  
it isn't calling Jay's cross compiler.

scan-build "interposes" on a build by overriding the CC environment  
variable to point to ccc-analyzer.  ccc-analyzer then calls 'gcc' to  
do the compilation, and 'clang-cc' to do the analysis.

Jay: To have scan-build use your cross-compiler, check out the '-use- 
cc' option.  'scan-build' with no options will tell you more.