On Jan 18, 2012, at 8:41 AM, Erik Verbruggen wrote:
>
>
> On 18 jan. 2012, at 16:19, Douglas Gregor <[email protected]> wrote:
>
>> Author: dgregor
>> Date: Wed Jan 18 09:19:58 2012
>> New Revision: 148393
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=148393&view=rev
>> Log:
>> In the driver, -fmodules enables modules for C/Objective-C but one
>> also needs -fcxx-modules to enable modules for C++/Objective-C++.
>
> Why the distinction?
Because I expect modules for C/Objective-C to be usable long before
C++/Objective-C++. Making this distinction allows someone with a mixed C/C++
project to turn on modules project-wide with -fmodules without breaking
horribly on the C++ code.
We did the same thing "back in the day" when Clang had decent C/ObjC support,
but C++ was still coming online (in that case, C++ fell back to g++ or
llvm-g++).
- Doug
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