[LLVMdev] config.h is becoming internal

[Alp Toker]

Hi LLVM developers and embedders,

This is a heads up to let you know that the llvm/Config/config.h header 
is becoming internal to the LLVM core source tree. As such, the header 
will no longer be installed, and is not to be used by anything under 
include/.

The cleanly namespaced llvm/Config/llvm-config.h continues to remain 
available to external and side-by-side projects like clang, and is the 
upgrade path if you were previously depending on config.h.

This is part of the 3.5 goal for library-friendly headers, resolving a 
class of issues where definitions from LLVM's config.h conflicted with 
other projects.

Please update your out-of-tree* LLVM-based projects appropriately in 
short order as the final uses have been fixed throughout upstream LLVM 
projects and it's time to switch. Thanks for bearing with the changes!

* You can still include config.h from external modules/passes which are 
imported and built strictly from within the LLVM source tree.

Alp.

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