[cfe-dev] Objective-C Boxed Expressions Error: unexpected '@' in program

[Charalampos Emmanouilidis]

Tried both compile flags as you suggested:


#-fobjc-nonfragile-abi
charemma$ clang  -x objective-c -I/opt/GNUstep/include -fobjc-nonfragile-abi -o main.c.o  -c main.c
main.c:10:22: error: unexpected '@' in program
    NSString *path = @(getenv("PATH"));
                     ^
1 error generated.



# -fobjc-runtime=gnustep, please note, this flag is not even recognized
charemma$ clang  -x objective-c -I/opt/GNUstep/include -fobjc-runtime=gnustep -o main.c.o  -c main.c
clang: warning: argument unused during compilation: '-fobjc-runtime=gnustep'
main.c:10:22: error: unexpected '@' in program
    NSString *path = @(getenv("PATH"));
                     ^
1 error generated.







On Dec 4, 2012, at 10:04 AM, David Chisnall <David.Chisnall at cl.cam.ac.uk> wrote:

> The new syntax is only supported with the non-fragile ABI.  Please add either -fobjc-nonfragile-abi or -fobjc-runtime=gnustep to your compile flags.
> 
> The new ABI is the default on *BSD, however clang defaults to the GCC ABI on GNU platforms for greater compatibility with legacy Objective-C implementations.
> 
> David
> 
> On 4 Dec 2012, at 06:05, Charalampos Chrysovalantis Emmanouilidis wrote:
> 
>> I'm trying to compile some Boxed Expressions with clang 3.1
>> 
>> ##
>> # Clang Version
>> ##
>> charemma $ clang --version 
>> Debian clang version 3.1-5ppa1 (branches/release_31) (based on LLVM 3.1)
>> Target: i386-pc-linux-gnu
>> Thread model: posix
>> 
>> ##
>> # Sample code in main.c
>> ##
>> NSString *path = @(getenv("PATH"));
>> NSLog(@"PATH %@", path);
>> 
>> 
>> ##
>> # compiler usage
>> ##
>> charemma$ clang  -x objective-c -I/opt/GNUstep/include  -o main.c.o  -c main.c
>> main.c:10:22: error: unexpected '@' in program
>>    NSString *path = @(getenv("PATH"));
>>                     ^
>> 1 error generated.
>> 
>> Do I need to pass any specific flag to clang to get support for Boxed Expressions like @(getenv("PATH"))?
>> 
>> According to this article http://clang.llvm.org/docs/ObjectiveCLiterals.html this should be supported starting with clang v3.1
>> _______________________________________________
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>> cfe-dev at cs.uiuc.edu
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> 

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