[cfe-dev] RFC: Clang driver redesign
Seth Cantrell
seth.cantrell at gmail.com
Tue Nov 8 16:19:26 PST 2011
Would the cost of always linking to the standard c++ library, unless asked not to, be too much?
On Nov 8, 2011, at 1:10 PM, Jean-Daniel Dupas wrote:
>
> Le 8 nov. 2011 à 18:16, David Chisnall a écrit :
>
>> On 8 Nov 2011, at 16:50, Jean-Daniel Dupas wrote:
>>
>>> As previously suggested in this discussion, I think it could be even better if clang can decide if it uses C or C++ mode not only based on the driver name, but also based on the compiled file language.
>>>
>>> clang -o hello hello.cpp
>>>
>>> should not result in nasty linker errors as it already knows it is compiling c++.
>>
>> You'll still encounter problems if you do:
>>
>> clang -c hello.cpp
>> clang -o hello hello.o
>>
>> Which is what even a trivial Makefile of the form that students are usually expected to submit in their first C or C++ assignment will do if you use clang instead of clang++ for linking. With your suggestion, it actually becomes worse, because now clang does work for linking C++ in some cases, but not in others.
>
> Good point. This inconsistency may be worse than the linking error.
>
>> David
>
> -- Jean-Daniel
>
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>
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