[cfe-dev] clang does not support extern for OpenCL

[Tanya Lattner]

On Apr 15, 2013, at 10:44 AM, Jordan Rose <jordan_rose at apple.com> wrote:

> I'm not familiar with the OpenCL part of the compiler, but I'm pretty sure you're not supposed to invoke -cc1 mode directly, just like the C compiler. The right way to do this is with the usual -std option:
> 
> clang -std=cl1.2 tmp.cl
> 
> This ensures that all the other driver-specified options get handled appropriately.

I agree that you shouldn't use -cc1, but -cl-std= should be a driver level option. If not, then it should be fixed.

-Tanya

> 
> Jordan
> 
> 
> On Apr 14, 2013, at 16:54 , "Liu, Yaxun (Sam)" <Yaxun.Liu at amd.com> wrote:
> 
>> Thanks. I got it.
>>  
>> For those who are curious, the command line is like
>>  
>> clang -cc1 -cl-std=CL1.2  tmp.cl
>>  
>> Sam
>>  
>> From: Tanya Lattner [mailto:lattner at apple.com] 
>> Sent: Friday, April 12, 2013 6:01 PM
>> To: Liu, Yaxun (Sam)
>> Cc: cfe-dev at cs.uiuc.edu
>> Subject: Re: [cfe-dev] clang does not support extern for OpenCL
>>  
>> You need to set the cl-std value to 1.2. By default its 1.1.
>>  
>> -Tanya
>>  
>> On Apr 12, 2013, at 2:40 PM, "Liu, Yaxun (Sam)" <Yaxun.Liu at amd.com> wrote:
>> 
>> 
>> I was trying to compile a simple OpenCL source with clang:
>>  
>> extern int foo(int, int);
>>  
>> I got an error msg:
>>  
>> clang.exe : tmp.cl:1:1: error: OpenCL does not support the 'extern' storage class specifier
>>  
>> OpenCL spec 1.2 says:
>> The typedef, extern, and static storage-class specifiers are supported. 
>>  
>> Is this a bug? Or did I miss anything? Thanks.
>>  
>> Sam
>>  
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