gcc: Conditionally-supported behavior

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1 5.1 Conditionally-Supported Behavior
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1 'Each implementation shall include documentation that identifies all
1 conditionally-supported constructs that it does not support (C++0x
1 1.4).'
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1    * 'Whether an argument of class type with a non-trivial copy
1      constructor or destructor can be passed to ... (C++0x 5.2.2).'
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1      Such argument passing is supported, using the same
1      pass-by-invisible-reference approach used for normal function
1      arguments of such types.
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