[PATCH] Make the presence of stdin and stdout optional

[Ed Schouten]

In http://reviews.llvm.org/D8340#140927, @jroelofs wrote:

> >   At the same time it attempts to clean up src/iostream.cpp
>
>
> Mind separating this into two logical patches?


No problem at all! I've just sent out the following code review:

http://reviews.llvm.org/D8342


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http://reviews.llvm.org/D8340

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