Review Board 2.0.15


scons: Bump compiler requirement to gcc >= 4.7 and clang >= 3.1

Review Request #2894 - Created June 18, 2015 and submitted - Latest diff uploaded

Information
Andreas Hansson
gem5
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Reviewers
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Changeset 10873:fe97584a05e0
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scons: Bump compiler requirement to gcc >= 4.7 and clang >= 3.1

This patch updates the compiler minimum requirement to gcc 4.7 and
clang 3.1, thus allowing:

1. Explicit virtual overrides (no need for M5_ATTR_OVERRIDE)
2. Non-static data member initializers
3. Template aliases
4. Delegating constructors

This patch also enables a transition from --std=c++0x to --std=c++11.