[LLVMdev] patch for portability

[Howard Hinnant]

I've completed a survey of llvm for unnecessary dependencies on libstdc++, and on conflicts with the upcoming C++0X standard, and am recommending several changes in the enclosed patch (created with svn diff).

Here is a summary of the patch:

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#include <cstdlib> added to LinkAllVMCore.h and LinkAllCodegenComponents.h to declare std::getenv.

Changed next(...) to llvm::next(...) in many places.  I only changed those instances which were actually required to avoid ambiguity.  I left other calls to next() unqualified.  I do not have strong feelings about how this particular situation should be fixed, but this solution seems the simplest to me.  I do not anticipate a fix from the standards committee on this matter, though if anyone would like to pursue this course of action, I can certainly help with that.

#include "X86MachinefunctionInfo.h" added to X86COFFMachineModuleInfo.h to make X86MachineFunctionInfo a complete class before it is used to instantiate std::map.

#include <ostream> added to TargetData.cpp to bring these formatting prototypes into scope.

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-Howard
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