K 10
svn:author
V 8
theraven
K 8
svn:date
V 27
2011-12-24T13:28:49.289049Z
K 7
svn:log
V 307
Some GCC-compatibility definitions.  Define clang's feature test pseudomacros
to always evaluate to 0 if we are using a compiler that doesn't implement them.
This lets us use the macros easily in standard headers (e.g. stdatomic.h, which
should be the subject of my next commit).

Approved by:	dim (mentor)

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